- 2-Dimensional Momentum Problem
 - 2-Dimensional Momentum Problem (Part 2)
 - 2003 AIME II Problem 11.avi
 - 2003 AIME II Problem 14
 - 2003 AIME II Problem 7
 - 2003 AIME II Problem 8
 - 20th Century Capitalism and Regulation in the United States
 - 30-60-90 Triangle Example Problem
 - 30-60-90 Triangle Side Ratios Proof
 - 30-60-90 Triangles II
 - 401(k)s
 - 45-45-90 Triangle Side Ratios
 - 45-45-90 Triangles
 - A Firm’s Marginal Product Revenue Curve
 - A Look at a Seductive but Wrong Gibbs/ Spontaneity Proof
 - A Universe Smaller than the Observable
 - A1C Levels
 - About the SAT: Content Changes to the New SAT
 - About the SAT: Introduction to the SAT Math Test
 - About the SAT: Introduction to the SAT Reading Test
 - About the SAT: Introduction to the SAT Writing & Language Test
 - Absolute Inequalities 2
 - Absolute Value 1
 - Absolute Value and Number Lines
 - Absolute Value as Distance Between Numbers
 - Absolute Value Equation Example 2
 - Absolute Value Equations
 - Absolute Value Equations 1
 - Absolute Value Equations 2
 - Absolute Value Equations Example 1
 - Absolute value inequalities Example 1
 - Absolute Value Inequalities Example 2
 - Absolute value inequalities example 3
 - Absolute Value of Integers
 - Abstract-ness
 - Acceleration
 - Acceleration Due to Gravity at the Space Station
 - Acceleration for Aircraft Carrier Takeoff
 - Accrual Basis of Accounting
 - Accumulating Foreign Currency Reserves
 - Acid Base Introduction
 - Acid Base Titration
 - Acquisitions with Shares
 - Actual CPI-U Basket of Goods
 - Actual Option Quotes
 - Acute Obtuse and Right Angles
 - Acute Right and Obtuse Angles
 - Ad Reinhardt, Abstract Painting
 - Adding 1 vs. Adding 10
 - Adding 10 or 100
 - Adding 5 + 3 + 6
 - Adding 7 + 6
 - Adding 8 + 7
 - Adding and Simplifying Radicals
 - Adding and Subtracting Fractions
 - Adding and Subtracting Fractions, Decimals and Percentages (1)
 - Adding and Subtracting Fractions, Decimals and Percentages (2)
 - Adding and Subtracting Multiple Fractions with Unlike Denominators
 - Adding and Subtracting Negative Numbers
 - Adding and Subtracting Pieces of Fruit
 - Adding and Subtracting Polynomials 1
 - Adding and Subtracting Polynomials 2
 - Adding and Subtracting Polynomials 3
 - Adding and Subtracting Rational Expressions
 - Adding and Subtracting Rational Expressions 1
 - Adding and Subtracting Rational Expressions 2
 - Adding and Subtracting Rational Expressions 3
 - Adding and Subtracting Real Numbers
 - Adding and Subtracting Real Numbers Application
 - Adding by Getting to a Group of 10 First
 - Adding Complex Numbers
 - Adding Decimals
 - Adding Decimals (Example 1)
 - Adding Decimals (Example 2)
 - Adding Decimals (Old)
 - Adding Decimals Word Problem
 - Adding Demand Curves
 - Adding Different Units for Weight
 - Adding Different Units of Length
 - Adding Fractions (ex 1)
 - Adding Fractions With Different Signs
 - Adding Fractions With Like Denominators
 - Adding Fractions With Unlike Denominators
 - Adding Fractions with Unlike Denominators
 - Adding Fractions with Unlike Denominators Word Problem
 - Adding Hundreds, Tens and Ones
 - Adding Integers With Different Signs
 - Adding Mixed Numbers
 - Adding Mixed Numbers Introduction
 - Adding Mixed Numbers with Regrouping
 - Adding Mixed Numbers With Unlike Denominators
 - Adding Mixed Numbers Word Problem
 - Adding Negative Numbers
 - Adding Negative Numbers on a Number Line
 - Adding Polynomials
 - Adding Rational Expressions
 - Adding Real Numbers Application
 - Adding Real Numbers With Different Signs
 - Adding Subtracting Mixed Numbers 0.5 (ex 1)
 - Adding Subtracting Mixed Numbers 0.5 (ex 2)
 - Adding Subtracting Mixed Numbers 1 (ex 1)
 - Adding Subtracting Mixed Numbers 1 (ex 2)
 - Adding Tenths and Hundredths as Fractions
 - Adding Three-Digit Numbers
 - Adding Three-Digit Numbers with Regrouping
 - Adding Three-Digit Numbers Without Regrouping
 - Adding to 10
 - Adding Two-Digit Numbers Without Regrouping (Example 1)
 - Adding Two-Digit Numbers Without Regrouping (Example 2)
 - Adding Whole Numbers and Applications 1
 - Adding Whole Numbers and Applications 2
 - Adding Whole Numbers and Applications 3
 - Adding Whole Numbers and Applications 4
 - Adding/Subtracting Negative Numbers
 - Adding: Why Carrying Works
 - Addition 2
 - Addition 3
 - Addition 4
 - Addition and Subtraction with Significant Figures
 - Addition and Subtraction Within 10
 - Addition and Subtraction Word Problems: Basketball Game
 - Addition and Subtraction Word Problems: Exercising Gorillas and Cookies
 - Addition and Subtraction Word Problems: Fence Posts for Horses
 - Addition and Subtraction Word Problems: Losing Tennis Balls
 - Addition and Subtraction Word Problems: Sea Monsters and Superheroes
 - Addition and Subtraction Word Problems: Snow on Friday
 - Addition and Subtraction Word Problems: Spinning Wheel
 - Addition and Subtraction Word Problems: Spots on a Die
 - Addition and Subtraction Word Problems: Starfish
 - Addition and Subtraction Word Problems: Using Crayons
 - Addition Elimination Method 1
 - Addition Elimination Method 2
 - Addition Elimination Method 3
 - Addition Elimination Method 4
 - Addition Rule for Probability
 - Addition Using Groups of 10 and 100
 - Addition with Regrouping
 - Addition Word Problems Within 10
 - Adequacy of the Lateral Cervical Spine X-Ray
 - Advanced JS: Games & Visualizations: 3D Shapes
 - Advanced JS: Games & Visualizations: Buttons
 - Advanced JS: Games & Visualizations: Introduction to Games & Visualizations
 - Advanced JS: Games & Visualizations: Making a Memory Game
 - Advanced JS: Games & Visualizations: Making a Side Scroller: Hoppy Beaver
 - Advanced JS: Games & Visualizations: Scene Management
 - Advanced JS: Games & Visualizations: Transformations
 - Advanced JS: Natural Simulations: Angular Movement
 - Advanced JS: Natural Simulations: Forces
 - Advanced JS: Natural Simulations: Introduction to Natural Simulations
 - Advanced JS: Natural Simulations: Noise
 - Advanced JS: Natural Simulations: Oscillations
 - Advanced JS: Natural Simulations: Particle Systems
 - Advanced JS: Natural Simulations: Randomness
 - Advanced JS: Natural Simulations: Vectors
 - Advanced ratio problems
 - Age word problems 1
 - Age word problems 2
 - Age word problems 3
 - Aggregate Demand
 - Airbus A380 Take-off Distance
 - Airbus A380 Take-off Time
 - Alberto Giacometti, The Palace at 4 a.m.
 - Albrecht Altdorfer, The Battle of Issus
 - Albrecht Durer, Self-Portrait
 - Albrecht Durer, The Four Apostles
 - Albrecht Durer, The Large Piece of Turf
 - Alexander Sarcophagus, The
 - Alexej von Jawlensky, Young Girl in a Flowered Hat
 - Algebra: Equation of a line
 - Algebra: graphing lines 1
 - Algebra: Linear Equations 4
 - Algebra: Slope
 - Algebra: Slope 2
 - Algebra: Slope 3
 - Algebra: Slope and Y-intercept intuition
 - Algebra: Solving Inequalities
 - Algebraic Expression Least Common Multiple
 - Algebraic Expressions Word Problem (1)
 - Algebraic Expressions Word Problem (2)
 - Algebraic Long Division
 - Algebraic Midpoint of a Segment
 - Algebraic Word Problem
 - Algorithms: Asymptotic Notation
 - Algorithms: Binary Search
 - Algorithms: Breadth-First Search
 - Algorithms: Further Learning
 - Algorithms: Graph Representation
 - Algorithms: Insertion Sort
 - Algorithms: Introduction to Algorithms
 - Algorithms: Merge Sort
 - Algorithms: Quick Sort
 - Algorithms: Recursive Algorithms
 - Algorithms: Selection Sort
 - Algorithms: Towers of Hanoi
 - Allende and Pinochet in Chile
 - Allocative Efficiency and Marginal Benefit
 - Altar of Augustan Peace
 - Alternate Mental Subtraction Method
 - Alternate Proof to Induction for Integer Sum
 - Alternate Solution to Ratio Problem (HD Version)
 - Alternative Minimum Tax
 - Ambrogio Lorenzetti, The Allegory of Good and Bad Government
 - American Call Options
 - American Put Options
 - American-Chinese Debt Loop
 - Amortization
 - Amortization and Depreciation
 - Amplitude, Period, Frequency and Wavelength of Periodic Waves
 - AMT Overview
 - An IPO
 - Analyzing a Dot Plot: Redistributing Trail Mix
 - Analyzing Clusters, Gaps, Peaks and Outliers for Distributions
 - Anatomy of a Muscle Cell
 - Anatomy of a Neuron
 - Ancient Greek Temples at Paestum
 - Andrea Pozzo, Glorification of Saint Ignatius
 - Andy Warhol, Cambell’s Soup Cans: Why is this Art?
 - Andy Warhol, Gold Marilyn Monroe
 - Angle Basics
 - Angle Bisector Theorem Examples
 - Angle Bisector Theorem Proof
 - Angle Game (part 2)
 - Angle Measure Word Problem: Apple Pie
 - Angle Measurement and Circle Arcs
 - Angle Word Problem: Stove Dial
 - Angles (part 2)
 - Angles (part 3)
 - Angles at the intersection of two lines
 - Angles formed between transversals and parallel lines
 - Angles Formed by Parallel Lines and Transversals
 - Angles of parallel lines 2
 - Animation Director: How I Got My Job and Where I’m Going
 - Animation Director: My Budget and Planning for the Future
 - Animation Director: What I Do and How Much I Make
 - Annibale Carracci, Crucifixion and Lamentation
 - Annual Interest Varying with Debt Maturity
 - Annual Percentage Rate (APR) and Effective APR
 - Another Isosceles Example Problem
 - Another Mass Composition Problem
 - Another Percent Word Problem
 - Another Quantitative Easing Video
 - Another Stoichiometry Example in a Solution
 - Another Take on the Rate Problem
 - Anthony Van Dyck, Charles I at the Hunt
 - Antoni Gaudi, Church of the Sagrada Familia
 - Ape Clarification
 - Appealing a Financial Aid Package
 - Application of Addition of Real Numbers
 - Application of Similar Triangles
 - Application of the Pythagorean Theorem in a Three-Dimensional Shape
 - Application Problem With Graph
 - Application Problem With Quadratic Formula
 - Application Problems Involving Units of Weight
 - Application Problems With Equation in One Variable
 - Applications Problem Factoring Quadratics
 - Applying for Financial Aid when Facing Immigration Challenges
 - Applying Logarithms
 - Applying Logarithms 2
 - Applying Quadratic Functions 1
 - Applying Quadratic Functions 2
 - Applying Quadratic Functions 3
 - Applying Radical Equations 1
 - Applying Radical Equations 2
 - Applying Radical Equations 3
 - Applying Rational Equations 1
 - Applying Rational Equations 2
 - Applying Rational Equations 3
 - Applying the Quadratic Formula
 - Applying to the Right Number of Colleges
 - Appomattox Court House and Lincoln’s Assassination
 - Approximating Square Roots
 - Approximating with Powers of 10
 - Apsidal Precession (Perihelion Precession) and Milankovitch Cycles
 - Arbitrage Basics
 - Arbitraging Futures Contract
 - Arbitraging Futures Contracts II
 - Arch of Constantine
 - Architectural Designer: How I Got My Job and Where I’m Going
 - Architectural Designer: My Budget and Planning for the Future
 - Architectural Designer: What I Do and How Much I Make
 - Are Hedge Funds Bad?
 - Are Southern Hemisphere Seasons More Severe?
 - Area and Perimeter
 - Area and Perimeter of Composite Figures
 - Area and Perimeter Word Problem: Comparing Areas of Rectangles
 - Area and Perimeter Word Problem: Table Dimensions
 - Area and Perimeter Word Problem: Width of a Dog Pen
 - Area Models to Visualize Division Using Place Value
 - Area of a Circle
 - Area of a circle
 - Area of a Kite
 - Area of a Parallelogram
 - Area of a Parallelogram
 - Area of a Parallelogram on the Coordinate Plane
 - Area of a Regular Hexagon
 - Area of a Shaded Region
 - Area of a Trapezoid
 - Area of a Trapezoid
 - Area of a Triangle
 - Area of an Equilateral Triangle
 - Area of Diagonal Generated Triangles of Rectangle are Equal
 - Area of Inscribed Equilateral Triangle (some basic trig used)
 - Area of Koch Snowflake (part 1) - Advanced
 - Area of Koch Snowflake (part 2) - Advanced
 - Area of Rectangles and the Distributive Property
 - Arithmetic Properties with Negative Numbers
 - Art & Context
 - Art Historical Analysis: A Basic Introduction Using Goya’s Third of May, 1808
 - Artemisia Gentileschi, Judith and Holofernes (Judith Slaying Holofernes)
 - Artemision Zeus or Poseidon
 - Assessing Alignment of the Lateral Cervical (neck) X-Ray
 - Assistant Hotel Manager: How I Got My Job and Where I’m Going
 - Assistant Hotel Manager: My Budget and Planning for the Future
 - Assistant Hotel Manager: What I Do and How Much I Make
 - Associative Law of Addition
 - Associative Law of Multiplication
 - Associative Property for Multiplication
 - Athenian Agora and the Experiment in Democracy, The
 - ATP: Adenosine Triphosphate
 - Audio Engineer: How I Got My Job and Where I’m Going
 - Audio Engineer: My Budget and Planning for the Future
 - Audio Engineer: Running a Freelance Business
 - Audio Engineer: What I Do and How Much I Make
 - Auguste Rodin, The Gates of Hell
 - Author: How I Got My Job and Where I’m Going
 - Author: My Budget and Planning for the Future
 - Author: What I Do and How Much I Make
 - Author: Working with an Agent
 - Automotive Mechanic: What I Do and How Much I Make
 - Average Velocity for Constant Acceleration
 - Averages
 - Avoiding Common Admissions Essay Mistakes
 - Axis of Symmetry
 - Aztec Feathered Headdress
 - Aztec Sun Stone (Calendar Stone)
 - B Lymphocytes (B Cells)
 - Back of Envelope Office Space Conundrum
 - Backwardation
 - Backwardation Bullish or Bearish
 - Bacteria
 - Bacterial Meningitis
 - Bailout 1: Liquidity vs. Solvency
 - Bailout 10: Moral Hazard
 - Bailout 11: Why These CDOs Could be Worth Nothing
 - Bailout 12: Lone Star Transaction
 - Bailout 13: Does the Bailout Have a Chance of Working?
 - Bailout 14: Possible Solution
 - Bailout 15: More on the Solution
 - Bailout 2: Book Value
 - Bailout 3: Book Value vs. Market Value
 - Bailout 4: Mark-to-Model vs. Mark-to-Market
 - Bailout 5: Paying Off the Debt
 - Bailout 6: Getting an Equity Infusion
 - Bailout 7: Bank Goes Into Bankruptcy
 - Bailout 8: Systemic Risk
 - Bailout 9: Paulson’s Plan
 - Balance of Payments - Capital Account
 - Balance of Payments - Current Account
 - Balance Sheet and Income Statement Relationship
 - Balancing Chemical Equations
 - Banking 1
 - Banking 10:  Introduction to Leverage
 - Banking 11: A Reserve Bank
 - Banking 12: Treasuries: Government Debt
 - Banking 13: Open Market Operations
 - Banking 14: Fed Funds Rate
 - Banking 15: More on the Fed Funds Rate
 - Banking 16: Why Target Rates vs. Money Supply
 - Banking 17: What Happened to the Gold?
 - Banking 18: Big Picture Discussion
 - Banking 2:  A Bank’s Income Statement
 - Banking 3:  Fractional Reserve Banking
 - Banking 4: Multiplier Effect and the Money Supply
 - Banking 5: Introduction to Bank Notes
 - Banking 6: Bank Notes and Checks
 - Banking 7: Giving Out Loans Without Giving Out Gold
 - Banking 8: Reserve Ratios
 - Banking 9: More on Reserve Ratios
 - Barnett Newman, Onement I
 - Barnett Newman, Vir Heroicus Sublimis
 - Base Ten Numbers and Place Value
 - Basic Addition
 - Basic Capital Structure Differences
 - Basic Cash Flow Statement
 - Basic Complex Analysis
 - Basic Leveraged Buyout (LBO)
 - Basic Linear Function
 - Basic Multiplication
 - Basic Probability
 - Basic Rate Problem
 - Basic Shapes
 - Basic Shorting
 - Basic Subtraction
 - Basic Trigonometry
 - Basic Trigonometry II
 - Basics of US Income Tax Return Schedule
 - Basilica of Constantine, Rome
 - Basilica of San Vitale, Ravenna
 - Bay of Pigs Invasion
 - Becoming a Red Giant
 - Beginnings of Life
 - Benefits and Drawbacks of College Loans
 - Benford’s Law Explanation (Sequel to Mysteries of Benford’s Law)
 - Benvenuto Cellini, Perseus with the Head of Medusa
 - Berthe Morisot, The Mother and Sister of the Artist
 - Best Strategies for Funding College
 - Big Bang Introduction
 - Binary Numbers
 - Binary, Decimals, and Hexadecimal Number Systems
 - Binomial Distribution 1
 - Binomial Distribution 2
 - Binomial Distribution 3
 - Binomial Distribution 4
 - Binomial Theorem (part 1)
 - Binomial Theorem (part 2)
 - Binomial Theorem (part 3)
 - Biodiversity Flourishes in Phanerozoic Eon
 - Birth of Stars
 - Birthday Probability Problem
 - Black Holes
 - Blood Sugar Levels
 - Blue Cross and Blue Shield
 - Boiling Point Elevation and Freezing Point Supression
 - Bonaventura Berlinghieri, Saint Francis Altarpiece
 - Bonds vs. Stocks
 - Box-and-Whisker Plots
 - Breakdown of Gas Prices
 - Breaking Apart Three-Digit Addition Problems
 - Breaking Apart Two-Digit Addition Problems
 - Brief History of the Representation of the Body in Western Painting, A
 - Brief History of the Representation of the Body in Western Sculpture, A
 - Bronze Casting
 - Bronzino & the Mannerist Portrait
 - Buddha of Medicine Bhaishajyaguru (Yaoshi Fo)
 - Budget Line
 - Buffers and Henderson-Hasselbalch
 - Business Office Manager: How I Got My Job and Where I’m Going
 - Business Office Manager: What I Do and How Much I Make
 - C-4 Photosynthesis
 - Calculating a Confidence Interval for a Proportion
 - Calculating Average Velocity or Speed
 - Calculating Dot and Cross Products with Unit Vector Notation
 - Calculating i Raised to Arbitrary Exponents
 - Calculating Real Return in Last Year Dollars
 - Calculating the Square Footage of a House
 - Calculator for Logarithms
 - Calculator for Natural Logarithms
 - Calculator for Powers of 10
 - Calculator for Powers of e
 - Calculus Proof of Centripetal Acceleration Formula
 - Call Option as Leverage
 - Call Payoff Diagram
 - Call Writer Payoff Diagrams
 - CAM Plants
 - Canceling Zeros when Dividing
 - Cancer
 - Cancerous Colon Tissue
 - Capacitance
 - Carbon 14  Dating 2
 - Carbon 14 Dating
 - Carnot Cycle and Carnot Engine
 - Carnot Efficiency 2: Reversing the Cycle
 - Carnot Efficiency 3: Proving that it is the Most Efficient
 - Carry Trade Basics
 - Caryatid & Ionic Column, Erechtheion
 - Cash Accounting
 - Caspar David Friedrich, Abbey Among Oak Trees
 - Caspar David Friedrich, Monk by the Sea
 - Categorize Triangles by Angle Size
 - Categorize Triangles by Side Length or by Angle Size
 - Categorizing Triangles Exercises (1)
 - Categorizing Triangles Exercises (2)
 - Cathedral of Notre Dame de Chartres (Part 1)
 - Cathedral of Notre Dame de Chartres (Part 2)
 - Cathedral of Notre Dame de Chartres (Part 3)
 - Celebrity & Art: Leonardo da Vinci’s Mona Lisa
 - Center of Mass
 - Central Limit Theorem
 - Centripetal Force and Acceleration Intuition
 - Cepheid Variables 1
 - Cervical Spine Protection in Airway Management
 - Challenging Perimeter Problem
 - Challenging Similarity Problem
 - Challenging Triangle Angle Problem
 - Change of State Example
 - Changes in Income, Population or Preferences
 - Changes in Market Equilibrium
 - Changing an Improper Fraction to a Mixed Number
 - Chapter 11: Bankruptcy Restructuring
 - Chapter 7: Bankruptcy Liquidation
 - Charlemagne, Part 1: An Introduction
 - Charlemagne, Part 2: The Carolingian Revival
 - Charles Barry and A.W.N. Pugin, Palace of Westminster (Houses of Parliament)
 - Charles Cooley: Looking Glass Self
 - Charles Garnier, Paris Opera House
 - Charles Willson Peale, Staircase Group (Portrait of Raphaelle Peale and Titian Ramsay Peale)
 - Chef de Cuisine: How I Got My Job and Where I’m Going
 - Chef de Cuisine: My Budget and Planning for the Future
 - Chef de Cuisine: What I Do and How Much I Make
 - Chi-Square Test for Association (Independence)
 - Chi-Square Test for Homogeneity
 - Chi-Square Test Using a Contingency Table
 - Childhood Growth
 - Chilling Water Problem
 - China Buys US Bonds
 - China Keeps Peg But Diversifies Holdings
 - China Pegs to Dollar Keep Trade Imbalance
 - Chinese Central Bank Buying Treasuries
 - Chinese Inflation
 - Choose Pounds or Ounces to Measure Weight
 - Chromosomes, Chromatids, Chromatin, etc.
 - Chronometric Revolution
 - Cimabue, Santa Trinita Madonna, and Giotto, Ognissanti Madonna
 - Circles: Radius, Diameter and Circumference
 - Circuits (Part 1)
 - Circuits (Part 2)
 - Circuits (Part 3)
 - Circuits (Part 4)
 - Circular Flow of Income and Expenditures
 - Circulatory System and the Heart
 - Circumcenter of a Right Triangle
 - Circumcenter of a Triangle
 - Circumference of a Circle
 - Circumference of a Circle
 - Citizenship: Challenges of Naturalization
 - Citizenship: Citizenship and Voting Rights of Indigenous People
 - Citizenship: Citizenship in Early America: Part One: 1789-1830s
 - Citizenship: Citizenship in Early America: Part Two: 1840s-1870s
 - Citizenship: Citizenship in the U.S. Territories and the District of Columbia
 - Citizenship: Civic Engagement
 - Citizenship: Civic Life, Private Life, Politics and Government
 - Citizenship: Civil Society
 - Citizenship: Economic Rights of Citizenship
 - Citizenship: Models of Citizenship
 - Citizenship: Obligations of Citizenship
 - Citizenship: Personal Rights of Citizenship
 - Citizenship: Political Rights of Citizenship
 - Citizenship: Responsibilities of Citizenship
 - Citizenship: Service in the United States
 - Citizenship: The 19th Amendment and Citizenship
 - Citizenship: The Dred Scott Case and Citizenship
 - Citizenship: The Naturalization Process
 - Citizenship: What Is Citizenship?
 - Citizenship: Who Are Non-Citizens?
 - Citizenship: Who Gets Citizenship at Birth?
 - Citizenship: Who Is Eligible for Naturalization?
 - City Planner: How I Got My Job and Where I’m Going
 - City Planner: My Budget and Planning for the Future
 - City Planner: What I Do and How Much I Make
 - Classical Orders, The
 - Classifying Shapes by Lines and Angles
 - Claude Monet, Cliff Walk at Pourville
 - Claude Monet, Gare St. Lazare
 - Claude Monet, Poplars
 - Claude Monet, Rouen Cathedral Series
 - Claude Monet, The Argenteuil Bridge
 - Claude Monet, The Water Lilies
 - Clinical Nurse Specialist and Food Entrepreneur: Our Budget and Planning for Our Future
 - Clinical Nurse Specialist: How I Got My Job and Where I’m Going
 - Clinical Nurse Specialist: What I Do and How Much I Make
 - Closed-End Mutual Funds
 - Coatlicue
 - Coin Flipping Example
 - Collateralized Debt Obligation (CDO)
 - Collateralized Debt Obligation Overview
 - Collective Learning
 - College Experience, The
 - Colon Dysplasia
 - Colosseum, The
 - Colossus of Constantine
 - Combinations
 - Combining Like Terms with Distribution
 - Comic Book Artist: How I Got My Job and Where I’m Going
 - Comic Book Artist: What I Do and How Much I Make
 - Commercial Airline Pilot: How I Got My Job and Where I’m Going
 - Commercial Airline Pilot: My Budget and Planning for the Future
 - Commercial Airline Pilot: What I Do and How Much I Make
 - Commercial Real Estate Advisor: How I Got My Job and Where I’m Going
 - Commercial Real Estate Advisor: My Budget and Planning for the Future
 - Commercial Real Estate Advisor: What I Do and How Much I Make
 - Common Denominators: 1/4 and 5/6
 - Common Denominators: 3/5 and 7/2
 - Common Divisibility Examples
 - Common Fractions to Decimals: Halves
 - Common Orthocenter and Centroid
 - Communism
 - Commutative Law of Addition
 - Commutative Law of Multiplication
 - Commutative Property for Addition
 - Comparative Advantage and Absolute Advantage
 - Comparative Advantage Specialization and Gains from Trade
 - Comparing Absolute Values
 - Comparing Absolute Values of Variables on the Number Line
 - Comparing Accrual and Cash Accounting
 - Comparing Areas and Perimeters of Rectangles
 - Comparing Areas of Plots of Land
 - Comparing Celsius and Fahrenheit Temperature Scales
 - Comparing Colleges Based on Campus Activities
 - Comparing Colleges Based on Diversity
 - Comparing Colleges Based on Financial Aid Policies
 - Comparing Colleges Based on Location, Size and Housing
 - Comparing Colleges Based on Majors Offered
 - Comparing Colleges Based on Special Focus or Affiliation
 - Comparing Decimals
 - Comparing Decimals (Example 1)
 - Comparing Decimals (Example 2)
 - Comparing Decimals 4
 - Comparing Decimals Visually
 - Comparing Decimals: Difference in Largest Place Value
 - Comparing Decimals: Ordering from Least to Greatest
 - Comparing Decimals: Ordering from Smallest to Biggest
 - Comparing Distributions with Dot Plots
 - Comparing Dot Plots, Histograms and Box Plots
 - Comparing Fractions
 - Comparing Fractions 2
 - Comparing Fractions of Different Wholes (Part 1)
 - Comparing Fractions of Different Wholes (Part 2)
 - Comparing Fractions on a Number Line
 - Comparing Fractions Visually and on a Number Line
 - Comparing Fractions Visually with Bars
 - Comparing Fractions Visually with Pies
 - Comparing Fractions with Greater Than and Less Than Symbols
 - Comparing Fractions with the Same Denominator
 - Comparing Fractions with the Same Numerator
 - Comparing Irrational Numbers Involving Radicals
 - Comparing Lengths
 - Comparing Linear Functions (Example 1)
 - Comparing Linear Functions (Example 2)
 - Comparing Linear Functions (Example 3)
 - Comparing Linear Functions Word Problem: Walking to School
 - Comparing Linear Functions Word Problem: Walking to Work
 - Comparing Linear Functions Word Problem: Wall Race
 - Comparing Multi-Digit Numbers
 - Comparing Negatives with Variables
 - Comparing Nonprofit vs. For Profit Colleges
 - Comparing Numbers of Objects
 - Comparing Numbers Represented in Different Ways
 - Comparing P-Values to Significance Levels
 - Comparing Place Values (Example 1)
 - Comparing Place Values (Example 2)
 - Comparing Public vs. Private Colleges
 - Comparing Rates
 - Comparing Rational Numbers
 - Comparing Side Lengths After Dilation
 - Comparing Small Numbers on the Number Line
 - Comparing Theoretical to Experimental Probabilities
 - Comparing Universities vs. Liberal Arts Colleges
 - Comparing Values with a Calculator
 - Comparing Vocational vs. 2-Year vs. 4-Year Colleges
 - Comparing Whole Numbers
 - Comparing Whole Numbers 2
 - Comparing Whole Numbers 3
 - Comparing with Multiplication: Basic Exercises
 - Comparison Word Problems
 - Comparison Word Problems: Ages and Heights
 - Comparison Word Problems: Money and Distance
 - Comparison Word Problems: Ron and Hermione Strength
 - Complementary and Supplementary Angles
 - Completing Perfect Square Trinomials
 - Completing the square
 - Completing the Square 1
 - Completing the Square 2
 - Completing the Square 3
 - Completing the Square 4
 - Completing the Square to Solve Quadratic Equations
 - Complex Conjugates
 - Complex Conjugates Example
 - Complex Determinant Example
 - Complex Numbers
 - Complex Numbers (part 1)
 - Complex Numbers (part 2)
 - Complex Roots From the Quadratic Formula
 - Complicated Rational Expressions
 - Components of GDP
 - Composer & Small Business Owner: Advice on Pursuing a Creative Career
 - Composer & Small Business Owner: How I Got My Job and Where I’m Going
 - Composer & Small Business Owner: My Budget and Planning for the Future
 - Composer & Small Business Owner: What I Do and How Much I Make
 - Composing Shapes
 - Compositional and Mechanical Layers of the Earth
 - Compound Inequalities
 - Compound Inequalities 2
 - Compound Inequalities 3
 - Compound Inequalities 4
 - Compound Interest and e (Part 2)
 - Compound Interest and e (Part 3)
 - Compound Interest and e (Part 4)
 - Compound Probability of Independent Events
 - Compound Sample Spaces
 - Computer Programming: A Shorter Shortcut
 - Computer Programming: Adding an Event Listener
 - Computer Programming: Adding Event Listeners with jQuery
 - Computer Programming: Altering Tables After Creation
 - Computer Programming: Animating DOM with SetInterval
 - Computer Programming: Animating Numeric Properties with jQuery
 - Computer Programming: Animating Styles with CSS Animations
 - Computer Programming: Animating Styles with RAF
 - Computer Programming: Animating Visibility with jQuery
 - Computer Programming: Arrays of Objects
 - Computer Programming: Booleans
 - Computer Programming: Chaining jQuery Methods
 - Computer Programming: Changing Attributes
 - Computer Programming: Changing CSS Classes
 - Computer Programming: Changing CSS Styles
 - Computer Programming: Changing Rows with UPDATE and DELETE
 - Computer Programming: Checking DOM Readiness with jQuery
 - Computer Programming: Clarifying with Comments
 - Computer Programming: Coloring with Code
 - Computer Programming: Combining Multiple Joins
 - Computer Programming: Creating Elements from Scratch
 - Computer Programming: Creating Elements with jQuery
 - Computer Programming: CSS : More Text Properties
 - Computer Programming: CSS in the Wild: Google Maps
 - Computer Programming: CSS Zen Garden
 - Computer Programming: CSS: Basics
 - Computer Programming: CSS: Box Model
 - Computer Programming: CSS: Combining Class and Element Selectors
 - Computer Programming: CSS: Descendant Selectors
 - Computer Programming: CSS: Dynamic Pseudo Classes
 - Computer Programming: CSS: Floating Elements
 - Computer Programming: CSS: Font Family
 - Computer Programming: CSS: Font Size
 - Computer Programming: CSS: Font Styles
 - Computer Programming: CSS: Grouping Elements
 - Computer Programming: CSS: Grouping Selectors
 - Computer Programming: CSS: Inheritance
 - Computer Programming: CSS: Positioning
 - Computer Programming: CSS: Selecting by Class
 - Computer Programming: CSS: Specificity
 - Computer Programming: CSS: Using Multiple Classes
 - Computer Programming: CSS: Width Height Overflow
 - Computer Programming: Debugging Web Pages with the Browser Console
 - Computer Programming: Debugging with Println()
 - Computer Programming: Drawing More Shapes with Code
 - Computer Programming: Drawing Triangles with Blocks
 - Computer Programming: Finding Elements by CSS Selector
 - Computer Programming: Finding Elements by ID
 - Computer Programming: Finding Elements with jQuery
 - Computer Programming: Finding Multiple Elements by Tag Name or Class Name
 - Computer Programming: For Loops
 - Computer Programming: Function Parameters
 - Computer Programming: Function Return Values
 - Computer Programming: Functions
 - Computer Programming: Getting Information on Elements with jQuery
 - Computer Programming: HTML: Basics
 - Computer Programming: HTML: Comments
 - Computer Programming: HTML: Images
 - Computer Programming: HTML: Internal Links
 - Computer Programming: HTML: Links
 - Computer Programming: HTML: Lists
 - Computer Programming: HTML: Tables
 - Computer Programming: HTML: Text Emphasis
 - Computer Programming: HTML: Validation
 - Computer Programming: If Statements
 - Computer Programming: If/Else (Part 1)
 - Computer Programming: If/Else (Part 2)
 - Computer Programming: Incrementing Shortcuts
 - Computer Programming: Introduction to Animation
 - Computer Programming: Introduction to Arrays
 - Computer Programming: Introduction to Coloring
 - Computer Programming: Introduction to Drawing
 - Computer Programming: Introduction to Games and Visualizations
 - Computer Programming: Introduction to Objects
 - Computer Programming: Introduction to Programming
 - Computer Programming: Introduction to Variables
 - Computer Programming: Introduction to While Loops
 - Computer Programming: Joining Related Tables
 - Computer Programming: Joining Related Tables with LEFT OUTER JOIN
 - Computer Programming: Joining Tables
 - Computer Programming: Joining Tables to Themselves with Self Joins
 - Computer Programming: jQuery Collections vs. DOM Nodes
 - Computer Programming: Local and Global Variables
 - Computer Programming: Logical Operators
 - Computer Programming: Looping Through Arrays
 - Computer Programming: Looping Through jQuery Collections
 - Computer Programming: Making Animations
 - Computer Programming: Making Drawings with Code
 - Computer Programming: Making Webpages Interactive with Events
 - Computer Programming: Modifying Arrays
 - Computer Programming: Modifying Elements with jQuery
 - Computer Programming: Modifying Objects
 - Computer Programming: More Complex Queries with AND OR
 - Computer Programming: More Drawing
 - Computer Programming: More Form Processing with jQuery
 - Computer Programming: More Mouse Interaction
 - Computer Programming: More Variables
 - Computer Programming: More While Loops
 - Computer Programming: Mouse Interaction
 - Computer Programming: Nested For Loops
 - Computer Programming: Object Inheritance
 - Computer Programming: Object Methods
 - Computer Programming: Object Types
 - Computer Programming: Preventing Default Behavior of Events
 - Computer Programming: Processing a Quiz with jQuery
 - Computer Programming: Processing Forms with Events
 - Computer Programming: Pseudocode
 - Computer Programming: Putting JavaScript in a Web Page
 - Computer Programming: Querying IN Subqueries
 - Computer Programming: Readable Code
 - Computer Programming: Resizing Shapes with Variable Expressions
 - Computer Programming: Restricting Grouped Results with HAVING
 - Computer Programming: Setting InnerHTML and TextContent
 - Computer Programming: Special Processing JavaScript Functions
 - Computer Programming: SQL or SEQUEL?
 - Computer Programming: SQL: Aggregating Data
 - Computer Programming: SQL: Creating a Table and Inserting Data
 - Computer Programming: SQL: Querying the Table
 - Computer Programming: Terrific Text (Part 1)
 - Computer Programming: Terrific Text (Part 2)
 - Computer Programming: The Document Object Model (DOM)
 - Computer Programming: The Power of the Docs
 - Computer Programming: The Window Object
 - Computer Programming: Using a JavaScript Library: Slideshow Library
 - Computer Programming: Using Event Properties in jQuery
 - Computer Programming: Using External CSS Style Sheets
 - Computer Programming: Using Inline CSS Styles
 - Computer Programming: Using Math Expressions
 - Computer Programming: Using the Event Properties
 - Computer Programming: Variable Expressions
 - Computer Programming: Welcome to Making Web Pages Interactive
 - Computer Programming: Welcome to Natural Simulations
 - Computer Programming: Welcome to SQL
 - Computer Programming: Welcome to the Web
 - Computer Programming: What Is an Algorithm and Why Should You Care?
 - Computer Programming: What Is jQuery?
 - Computer Programming: What Is Programming?
 - Computing and Comparing Rates
 - Concave Lenses
 - Conceptual Understanding of Multiplying Fractions and Whole Numbers (Example 1)
 - Conceptual Understanding of Multiplying Fractions and Whole Numbers (Example 2)
 - Conditional Probability and Combinations
 - Confidence Interval Example
 - Confidence Interval for the Slope of a Regression Line
 - Confidence Intervals and Margin of Error
 - Congruent and Similar Triangles
 - Congruent legs and base angles of Isosceles Triangles
 - Congruent Triangle Example 2
 - Congruent Triangle Proof Example
 - Congruent Triangles and SSS
 - Conic Identification 3
 - Conic Sections: Hyperbolas 2
 - Conic Sections: Hyperbolas 3
 - Conic Sections: Intro to Circles
 - Conic Sections: Intro to Ellipses
 - Conic Sections: Intro to Hyperbolas
 - Conjugate Acids and Bases
 - Connecting the Keynesian Cross to the IS-Curve
 - Connection between even and odd numbers and functions
 - Conservation of Angular Momentum
 - Conservation of Energy
 - Consistent and Inconsistent Systems
 - Consistent System of Independent Equations t2
 - Constant Unit Elasticity
 - Constantin Brancusi, Bird in Space
 - Construct a Right Isosceles Triangle
 - Construct a Triangle with Constraints
 - Constructing a Box-and-Whisker Plot (Example 1)
 - Constructing a Box-and-Whisker Plot (Example 2)
 - Constructing a Box-and-Whisker Plot (Example 3)
 - Constructing a Confidence Interval for a Mean Difference with Paired Data
 - Constructing a Probability Model from Observations
 - Constructing a Scatter Plot
 - Constructing Angles
 - Constructing Numerical Expressions
 - Construction Business Owner: How I Got My Job and Where I’m Going
 - Construction Business Owner: What I Do and How Much I Make
 - Consultant: How I Got My Job and Where I’m Going
 - Consultant: My Budget and Planning for the Future
 - Consultant: The Pros and Cons of Traveling for Work
 - Consultant: What I Do and How Much I Make
 - Consumer Surplus Introduction
 - Consumption Function Basics
 - Consumption Function with Income Dependent Taxes
 - Contango
 - Contango and Backwardation Review
 - Contango from Trader Perspective
 - Conversation about Drug Pricing
 - Conversion Between Metric Units
 - Converting a Fraction to a Repeating Decimal
 - Converting Decimals to Fractions (Example 1)
 - Converting Decimals to Fractions (Example 2)
 - Converting Decimals to Fractions (Example 3)
 - Converting Farenheit to Celsius
 - Converting Fractions to Decimals
 - Converting Fractions to Decimals Example
 - Converting Gallons to Quarts Pints and Cups
 - Converting Mixed Numbers and Improper Fractions (ex 1)
 - Converting Mixed Numbers and Improper Fractions (ex 2)
 - Converting Mixed Numbers to Improper Fractions
 - Converting Pounds to Ounces
 - Converting Repeating Decimals to Fractions 1
 - Converting Repeating Decimals to Fractions 2
 - Converting to slope-intercept form
 - Converting Units of Length
 - Converting Within the Metric System
 - Convex Lens Examples
 - Convex Lenses
 - Convex Parabolic Mirrors
 - Coordinate Plane Word Problem
 - Coordinate Plane: Graphing Points
 - Coordinate Plane: Graphing Points and Naming Quadrants
 - Coordinate Plane: Graphing Points Word Problem
 - Coordinate Plane: Have All the Points Been Graphed?
 - Coordinate Plane: Reflecting Points
 - Coordinates of a Rectangle
 - Corporate Debt versus Traditional Mortgages
 - Corporations and Limited Liability
 - Correction to Calendar Notation
 - Correction to Force of Friction Keeping the Block Stationary
 - Correction to Sodium Potassium Pump video
 - Correction to Total Final Velocity for Projectile
 - Correlation and Causality
 - Cosmic Background Radiation
 - Cosmic Background Radiation 2
 - Cosmological Time Scale 1
 - Cosmological Time Scale 2
 - Cost Push Inflation
 - Count by Category
 - Counting American Coins
 - Counting by Tens
 - Counting Dogs, Mice and Cookies
 - Counting Dollars
 - Counting in Order
 - Counting in Pictures
 - Counting Outcomes Using a Chart
 - Counting Outcomes Using a Tree Diagram
 - Counting to Find Missing Numbers Between 100 and 120
 - Counting Whales, Sheep and Flowers
 - Counting with a Number Grid
 - Counting with Small Numbers
 - Covalent Networks, Metallic, and Ionic Crystals
 - CPI Index
 - Creating a Bar Chart
 - Creating a Fraction Through Division of Whole Numbers
 - Creating Picture and Bar Graphs
 - Creating Rectangles with a Given Area (Example 1)
 - Creating Rectangles with a Given Area (Example 2)
 - Creating the Largest Possible Number
 - Credit Default Swaps
 - Credit Default Swaps (CDS)  Intro
 - Credit Default Swaps 2
 - Cross Elasticity of Demand
 - Cross Product 1
 - Cross Product 2
 - Cross Product and Torque
 - CSS PROFILE Walkthrough Part 1: Registration
 - CSS PROFILE Walkthrough Part 2: Parent Demographics
 - CSS PROFILE Walkthrough Part 3: Parent Financial Information
 - CSS PROFILE Walkthrough Part 4: Parent Assets and Expenses
 - CSS PROFILE Walkthrough Part 5: Student Demographics and Financial Information
 - CSS PROFILE Walkthrough Part 6: Family List, Special Circumstances and Supplemental Questions
 - Cuban Missile Crisis
 - Cupcake Economics 2
 - Cupcake Economics 3
 - Currency Effect on Trade
 - Currency Effect on Trade Review
 - Currency Exchange Introduction
 - Customer Success Manager: How I Got My Job and Where I’m Going
 - Customer Success Manager: My Budget and Planning for the Future
 - Customer Success Manager: My Educational Choices
 - Customer Success Manager: What I Do and How Much I Make
 - Cylinder Volume and Surface Area
 - Cytotoxic T Cells
 - Damascus Room
 - Damien Hirst’s Shark: Interpreting Contemporary Art
 - Dancer: How I Got My Job and Where I’m Going
 - Dancer: My Budget and Planning for the Future
 - Dancer: What I Do and How Much I Make
 - Data on  Chinese US Balance of Payments
 - Data on Chinese Foreign Assets Increase in 2010
 - Data on Chinese M1 Increase in 2010
 - Debt Loops Rationale and Effects
 - Deciding When to Apply: Early vs. Regular Decision
 - Deciding Whether to Retake the ACT
 - Deciding Whether to Retake the SAT
 - Decimal Intuition with Grids
 - Decimal Place Value
 - Decimal Place Value 2
 - Decimals and Fractions
 - Decimals as Words
 - Decimals on a Number Line
 - Decimals: Choosing a Number to Represent Place Value
 - Decimals: Comparing Place Values
 - Decimals: Expanding Out Place Value
 - Decimals: Writing It Out as a Number
 - Decimals: Writing It Out in Words
 - Decomposing a Fraction Visually
 - Decomposing a Mixed Number
 - Decomposing Angles
 - Decomposing Hundredths on a Number Line
 - Decomposing Shapes to Find Area: Addition
 - Decomposing Shapes to Find Area: Grids
 - Decomposing Shapes to Find Area: Subtraction
 - Deductive Reasoning 1
 - Deductive Reasoning 2
 - Deductive Reasoning 3
 - Deficit and Debt Ceiling
 - Deflation
 - Deflation Despite Increases in Money Supply
 - Deflationary Spiral
 - Demand Curve as Marginal Benefit Curve
 - Demand-Pull Inflation under Johnson
 - Density Word Problem: Blimp
 - Dependent and Independent Variables: Expressing the Graph as an Equation
 - Dependent and Independent Variables: Graphing the Equation
 - Dependent and Independent Variables: The Basics
 - Dependent Probability Example 1
 - Dependent Probability Example 2
 - Depreciating the Truck
 - Depreciation
 - Depreciation in Cash Flow
 - Depriciation and Opportunity Cost of Capital
 - Deriving Demand Curve from Tweaking Marginal Utility per Dollar
 - Deriving Displacement as a Function of Time, Acceleration and Initial Velocity
 - Deriving Max Projectile Displacement Given Time
 - Descartes and Cartesian Coordinates
 - Describing and Meaning of Percent
 - Describing and Meaning of Percent 2
 - Describing Scatter Plots
 - Details on Shifting Aggregate Planned Expenditures
 - Detectable Civilizations in our Galaxy 1
 - Detectable Civilizations in our Galaxy 2
 - Detectable Civilizations in our Galaxy 3
 - Detectable Civilizations in our Galaxy 4
 - Detectable Civilizations in our Galaxy 5
 - Determinant and Area of a Paralleogram
 - Determine Sample Size for a Given Confidence Interval/Margin of Error
 - Determining Probability
 - Determining Rates with Fractions
 - Determining the equation of a trigonometric function
 - Development of Agriculture and Writing
 - Die Rolling Probability
 - Diego Velazquez, Las Meninas
 - Diego Velazquez, The Drunks (Los Borrachos)
 - Diego Velazquez, Vulcan’s Forge
 - Difference of Cubes Factoring
 - Difference of Functions
 - Difference of Logarithms with Same Base
 - Different Ways to Determine Time in Air
 - Different Ways to Represent 1 as a Fraction
 - Differentiability and Continuity
 - Diffusion and Osmosis
 - Digging Through Time
 - Dimensions of a Cube from Its Volume
 - Dimensions of Rectangle from Coordinates
 - Direct and Inverse Variation
 - Direct Inverse and Joint Variation
 - Direct Variation 1
 - Direct Variation Application
 - Director of Photography: How I Got My Job and Where I’m Going
 - Director of Photography: My Budget and Planning for the Future
 - Director of Photography: What I Do and How Much I Make
 - Director of Products: How I Got My Job and Where I’m Going
 - Director of Products: What I Do and How Much I Make
 - Discriminant for Types of Solutions for a Quadratic
 - Displacement from Time and Velocity Examples
 - Distance Conversions (Metric)
 - Distance Conversions (U.S. Customary)
 - Distributive Property 2, The
 - Distributive Property 3
 - Distributive Property, The
 - District Representative: How I Got My Job and Where I’m Going
 - District Representative: My Budget and Planning for the Future
 - District Representative: What I Do and How Much I Make
 - District Representative: Working in Public Service
 - Dividing a Decimal by a Power of 10
 - Dividing and Simplifying Rational Expressions
 - Dividing by a Two-Digit Number (Example 1)
 - Dividing by a Two-Digit Number (Example 2)
 - Dividing Completely to Get a Decimal Answer
 - Dividing Complex Numbers
 - Dividing Decimals
 - Dividing Decimals
 - Dividing Decimals 2.1
 - Dividing Decimals Completely
 - Dividing Fractions
 - Dividing Fractions
 - Dividing Fractions Example
 - Dividing Fractions Word Problem
 - Dividing Mixed Numbers
 - Dividing Mixed Numbers and Fractions
 - Dividing Monomials
 - Dividing Multivariable Polynomial With Monomial
 - Dividing Negative Fractions
 - Dividing Numbers: Introduction to Long Division
 - Dividing Numbers: Introduction to Remainders
 - Dividing Numbers: Long Division
 - Dividing Numbers: Long Division with a Remainder
 - Dividing Polynomials 1
 - Dividing Polynomials With Remainders
 - Dividing Real Numbers With Different Signs
 - Dividing Whole Numbers and Applications 1
 - Dividing Whole Numbers and Applications 2
 - Dividing Whole Numbers and Applications 3
 - Dividing Whole Numbers and Applications 4
 - Dividing Whole Numbers and Applications 5
 - Dividing Whole Numbers and Applications 6
 - Dividing Whole Numbers and Fractions Word Problem: Potpourri
 - Dividing Whole Numbers and Fractions Word Problem: Studying
 - Dividing Whole Numbers by 10
 - Division 1
 - Division 2
 - Division 3: More Long Division and Remainders Examples
 - Division Using Understanding of Place Value
 - Division Word Problem: Field Goals
 - DNA
 - Does a Vertical Line Represent a Function?
 - Doing the Example with Accounts Payable Growing
 - Domain and Range 1
 - Domain and Range 2
 - Domain and Range of  Function Given a Formula
 - Domain and Range of a Relation
 - Domain of a function
 - Domain of a Radical Function
 - Domain of a Rational Expression 1
 - Donald Judd, Untitled
 - Donatello, David
 - Doppler Effect Formula for Observed Frequency
 - Doppler Effect Formula When Source is Moving Away
 - Dot vs. Cross Product
 - Drawing a Quadrilateral on the Coordinate Plane
 - Drawing a Trapezoid on the Coordinate Plane
 - Drawing Acute, Right and Obtuse Angles
 - Drawing Conclusions in a Hypothesis Test of a Sample Proportion
 - Drawing Line Segments
 - Early Train Word Problem
 - Earnings and EPS
 - Earth Formation
 - EBITDA
 - Economic Growth through Investment
 - Economic Profit vs. Accounting Profit
 - Economics of a Cupcake Factory
 - Ed Kienholz and Nancy Reddin Kienholz, Useful Art #5: The Western Hotel
 - Edgar Degas, At the Races in the Countryside
 - Edgar Degas, The Bellelli Family
 - Edgar Degas, The Dance Class
 - Edgar Degas, Visit to a Museum
 - Edgar Degas, Woman Bathing in a Shallow Tub
 - Edouard Manet, A Bar at the Folies-Bergere
 - Edouard Manet, Corner of a Cafe-Concert
 - Edouard Manet, Emile Zola
 - Edouard Manet, In the Conservatory
 - Edouard Manet, The Balcony
 - Edouard Manet, The Railway
 - Education Resource Specialist: How I Got My Job and Where I’m Going
 - Education Resource Specialist: My Budget and Planning for the Future
 - Education Resource Specialist: What I Do and How Much I Make
 - Education Resource Specialist: Work-Life Balance and Parental Leave
 - Edvard Munch, The Storm
 - Edward Hopper, Nighthawks
 - Efficiency of a Carnot Engine
 - Eigenvalues of a 3x3 Matrix
 - El Greco, Adoration of the Shepherds
 - Elasticity and Strange Percent Changes
 - Elasticity of Supply
 - Electoral College
 - Electric Potential Energy
 - Electric Potential Energy (Part 2 - involves Calculus)
 - Electron Configurations
 - Electron Configurations 2
 - Electron Transport Chain
 - Electrostatics (Part 1) Introduction to Charge and Coulumb’s Law
 - Electrostatics (Part 2)
 - Electrotonic and Action Potentials
 - Elements and Atoms
 - Elements of a Strong Recommendation Letter
 - Embryonic Stem Cells
 - Emergency Medical Technician (EMT): How I Got My Job and Where I’m Going
 - Emergency Medical Technician (EMT): My Budget and Planning for the Future
 - Emergency Medical Technician (EMT): What I Do and How Much I Make
 - Empirical and Molecular Formulas from Stoichiometry
 - Energy Inputs for Tilling a Hectare of Land
 - Engaging in Extracurricular Activities
 - Enterprise Value
 - Enthalpy
 - Entropy Intuition
 - Environmental Specialist: How I Got My Job and Where I’m Going
 - Environmental Specialist: My Budget and Planning for the Future
 - Environmental Specialist: What I Do and How Much I Make
 - Epidemic Intelligence Service Officer: How I Got My Job and Where I’m Going
 - Epidemic Intelligence Service Officer: What I Do and How Much I Make
 - Equal Parts of Circles and Rectangles
 - Equal Sign
 - Equalizing Marginal Utility per Dollar Spent
 - Equation fo a Line Hairier Example
 - Equation of a Line 1
 - Equation of a Line 2
 - Equation of a line 2
 - Equation of a Line 3
 - Equation Special Cases
 - Equations 2
 - Equations 3
 - Equations of Proportional Relationships
 - Equations of Sequence Patterns
 - Equestrian Sculpture of Marcus Aurelius
 - Equilateral and Isosceles Example Problems
 - Equilateral Triangle Sides and Angles Congruent
 - Equity vs. Debt
 - Equivalent Expressions with Distribution and Negative Numbers
 - Equivalent Expressions with Negative Numbers
 - Equivalent Fraction Models
 - Equivalent Fractions
 - Equivalent Fractions and Different Wholes
 - Equivalent Fractions Example
 - Equivalent Fractions Visually and on a Number Line
 - Equivalent Fractions with Visuals
 - Erechtheion, The
 - Ernst Ludwig Kirchner, Street, Dresden
 - Estate Tax Basics
 - Estate Tax Introduction
 - Estimating Lengths
 - Estimating P-Value from a Simulation
 - Estimating the Line of Best Fit
 - Estimation With Decimals
 - Euclid as the Father of Geometry
 - Eugene Delacroix, Liberty Leading the People
 - Eugene Delacroix, Scene of the Massacre at Chios
 - Eugene Delacroix, The Death of Sardanapalus
 - Euler Line
 - Euler’s Line Proof
 - Eva Hesse, Untitled (1966)
 - Eva Hesse, Untitled (1970)
 - Evaluate a Formula Using Substitution
 - Evaluate a Statistical Study
 - Evaluating a Polynomial at a Given Value
 - Evaluating an Algebraic Expression in a Word Problem
 - Evaluating an Expression With Multiple Variables
 - Evaluating Exponential Expressions
 - Evaluating Exponential Expressions 2
 - Evaluating Expressions With Two Variables
 - Evaluating Functions
 - Evaluating Functions Given Their Formula
 - Evaluating Functions Given Their Graph
 - Evaluating Numeric Expressions with Fractions
 - Evaluating Numerical Expressions with and Without Parentheses
 - Events and Outcomes 1
 - Events and Outcomes 2
 - Events and Outcomes 3
 - Exactly Three Heads in Five Flips
 - Example Calculating Real GDP with a Deflator
 - Example involving an isosceles triangle and parallel lines
 - Example of Finding Reactant Empirical Formula
 - Example of Solving for a Variable
 - Examples of Accounting for GDP
 - Exchange Traded Funds (ETFs)
 - Expected Value of Binomial Distribution
 - Expected Value: E(X)
 - Expensing a Truck Leads to Inconsistent Performance
 - Experimental Probability
 - Exploring linear relationships
 - Exploring Medial Triangles
 - Exploring nonlinear relationships
 - Exponent Properties 1
 - Exponent Properties 2
 - Exponent Properties 3
 - Exponent Properties 4
 - Exponent Properties 5
 - Exponent Properties 6
 - Exponent Properties 7
 - Exponent Rules 1
 - Exponent Rules 2
 - Exponent Rules 3
 - Exponential Application
 - Exponential form to find complex roots
 - Exponential Growth
 - Exponents and Powers of Zero Patterns
 - Exponents Rules Part 1
 - Exponents Rules Part 2
 - Exponents with Negative Bases
 - Extraneous Solutions for Radical Equations
 - Extraneous Solutions to Rational equations
 - Extreme Value Theorem
 - Facing the Standardized Tests
 - Factor Expressions by Grouping
 - Factoring a Linear Binomial by Taking a Common Factor
 - Factoring Algebraic Expressions Using the Distributive Property
 - Factoring and the Distributive Property
 - Factoring and the Distributive Property 2
 - Factoring and the Distributive Property 3
 - Factoring Difference of Squares
 - Factoring Perfect Square Trinomials
 - Factoring Special Products 1
 - Factoring Special Products 2
 - Factoring Special Products 3
 - Factoring Sum of Cubes
 - Factoring Trinomials by Grouping 1
 - Factoring Trinomials by Grouping 2
 - Factoring Trinomials by Grouping 3
 - Factoring Trinomials by Grouping 4
 - Factoring Trinomials by Grouping 5
 - Factoring Trinomials by Grouping 6
 - Factoring Trinomials With a Common Factor
 - Factoring Trinomials With a Leading 1 Coefficient
 - Factoring Trinomials With a Non-1 Leading Coefficient by Grouping
 - Factors Affecting Supply
 - FAFSA Walkthrough Part 1: Account Setup
 - FAFSA Walkthrough Part 2: Student Demographics
 - FAFSA Walkthrough Part 3: School Selection
 - FAFSA Walkthrough Part 4: Dependency Status
 - FAFSA Walkthrough Part 5: Parent Demographics
 - FAFSA Walkthrough Part 6: Parent Financial Information
 - FAFSA Walkthrough Part 7: Student Financial Information
 - FAFSA Walkthrough Part 8: Sign and Submit
 - Fair Value Accounting
 - Fed Open Market Operations
 - Federal Reserve Balance Sheet
 - Ferris Wheel Trig Problem
 - Ferris Wheel Trig Problem (part 2)
 - FICA Tax
 - Figuring out all the angles for congruent triangles example
 - Filippo Brunelleschi, Dome of the Cathedral of Florence
 - Filling Rectangles with Squares
 - Film Director: How I Got My Job and Where I’m Going
 - Film Director: My Budget and Planning for the Future
 - Film Director: What I Do and How Much I Make
 - Financial Aid Package Comparison (Part 3)
 - Financial Aid Package Components (Part 1)
 - Financial Aid Package Example (Part 2)
 - Financial Crisis in Thailand Caused by Speculative Attack
 - Financial Weapons of Mass Destruction
 - Find an Unknown in a Proportion
 - Find an Unknown in a Proportion 2
 - Find Measure of Complementary Angles
 - Find Measure of Supplementary Angles
 - Find the Measure of Vertical Angles
 - Find the Volume of a Ring
 - Find the Volume of Rectangular Crates Inside Rectangular Crates
 - Finding a Missing Side when Given Perimeter
 - Finding a Missing Side when Given the Area
 - Finding a Percentage
 - Finding Area by Breaking Up the Shape
 - Finding Area by Rearranging Parts
 - Finding Area Using Similarity and Congruence
 - Finding Common Denominators
 - Finding Congruent Triangles
 - Finding Cube Roots
 - Finding Factors and Multiples
 - Finding Factors of a Number
 - Finding Intercepts from a Table
 - Finding Missing Angles
 - Finding more angles
 - Finding Patterns in Numbers
 - Finding Surface Area of a Triangular Prism Using a Net
 - Finding the 100th Term in a Sequence
 - Finding the Coordinates of the Missing Vertex
 - Finding the Equation of a Line in Slope-Intercept Form from a Table
 - Finding the Perimeter when a Side Length Is Missing
 - Finding the Reasonable Unit of Measurement
 - Finding the Right Scatter Plot to Describe Data
 - Finding the X-Intercept of a Line
 - Finding Unit Rates
 - Firefighter: How I Got My Job and Where I’m Going
 - Firefighter: My Budget and Planning for the Future
 - Firefighter: What I Do and How Much I Make
 - Firestick Farming
 - First Degree Price Discrimination
 - First Law of Thermodynamics/ Internal Energy
 - First Lieutenant, U.S. Army: How I Got My Job and Where I’m Going
 - First Lieutenant, U.S. Army: My Budget and Planning for the Future
 - First Lieutenant, U.S. Army: What I Do and How Much I Make
 - First Living Things on Land Clarification
 - Fixed, Variable and Marginal Cost
 - Floating Exchange Effect on China
 - Floating Exchange Effect on US
 - Floating Exchange Resolving Trade Imbalance
 - Fluids (Part 1)
 - Fluids (Part 10)
 - Fluids (Part 11)
 - Fluids (Part 12)
 - Fluids (Part 2)
 - Fluids (Part 3)
 - Fluids (Part 4)
 - Fluids (Part 5)
 - Fluids (Part 6)
 - Fluids (Part 7)
 - Fluids (Part 8)
 - Fluids (Part 9)
 - Foci of a Hyperbola
 - Foci of an Ellipse
 - Focus and Directrix of a Parabola 2
 - Food Entrepreneur: How I Got My Job and Where I’m Going
 - Food Entrepreneur: What I Do and How Much I Make
 - Food Truck Manager & Chef: How I Got My Job and Where I’m Going
 - Food Truck Manager & Chef: My Budget and Planning for the Future
 - Food Truck Manager & Chef: What I Do and How Much I Make
 - Force of Friction Keeping the Block Stationary
 - Force of Friction Keeping Velocity Constant
 - Formula From Mass Composition
 - Forward Contract Introduction
 - Four Fundamental Forces
 - Fra Angelico, The Annunciation
 - Fra Filippo Lippi, Madonna and Child with Two Angels
 - Fraction Basics
 - Fraction Word Problem: Lizard Length
 - Fraction Word Problem: Piano Practice
 - Fraction Word Problem: Pieces of Pizza
 - Fraction Word Problem: Spider Eyes
 - Fraction Word Problems 1 (ex 1)
 - Fraction Word Problems 1 (ex 2)
 - Fraction Word Problems 1 (ex 3)
 - Fraction Word Problems 1 (ex 4)
 - Fraction-Decimal Intuition Problems
 - Fractional Exponent Expressions 1
 - Fractional Exponent Expressions 2
 - Fractional Exponent Expressions 3
 - Fractional Reserve Banking Commentary 1
 - Fractions as Division by Power of 10
 - Fractions in Lowest Terms
 - Fractions on a Number Line (Example 1)
 - Fractions on a Number Line (Example 2)
 - Fractions on the Number Line 1 (ex 1)
 - Fractions on the Number Line 1 (ex 2)
 - Fractions on the Number Line 2 (ex 1)
 - Fractions on the Number Line 3 (ex 1)
 - Fractions on the Number Line 3 (ex 2)
 - Fractions: More than One Equal Section
 - Francisco Goya, The Family of Charles IV
 - Francois Boucher, Madame de Pompadour
 - Frank Lloyd Wright, Solomon R. Guggenheim Museum, New York City
 - FRB Commentary 2: Deposit Insurance
 - FRB Commentary 3: Big Picture
 - Freelance Journalist & Podcaster: How I Got My Job and Where I’m Going
 - Freelance Journalist & Podcaster: My Budget and Planning for the Future
 - Freelance Journalist & Podcaster: Salary Negotiation
 - Freelance Journalist & Podcaster: What I Do and How Much I Make
 - French Invasion of Russia
 - French Revolution (Part 1)
 - French Revolution (Part 2)
 - French Revolution (Part 3)- Reign of Terror
 - French Revolution (Part 4)- The Rise of Napoleon Bonaparte
 - Frequency Probability and Unfair Coins
 - Frequency Stability
 - Frequency Tables and Dot Plots
 - Frida Kahlo, Frieda and Diego Rivera
 - Full Reserve Banking
 - Fun Trig Problem
 - Function Inverse Example 1
 - Function Inverses Example 2
 - Function Inverses Example 3
 - Function Notation in Context
 - Functional Relationships 1
 - Functions (part 4)
 - Functions (Part III)
 - Functions Part 2
 - Fundamental Theorem of Algebra
 - Futures and Forward Curves
 - Futures Curves II
 - Futures Fair Value in the Pre-Market
 - Futures Introduction
 - Futures Margin Mechanics
 - Futurism
 - Galactic Collisions
 - Galvanic Cells
 - Game Theory of Cheating Firms
 - GCF to Factor a Polynomial
 - GDP Deflator
 - Geithner 5: A Better Solution
 - Geithner Plan 2.5
 - Geithner Plan I
 - Geithner Plan II
 - Geithner Plan III
 - Geithner Plan IV
 - Generalized Linear Consumption Function
 - Generalizing with Binomial Coefficients (bit advanced)
 - Generating Equivalent Fractions
 - Geometric series sum to figure out mortgage payments
 - George Bellows, Pennsylvania Station
 - George Herbert Mead: The I and the Me
 - Georges Braque, The Viaduct at L’Estaque
 - Georges Seurat, A Sunday Afternoon on La Grande Jatte
 - Georges Seurat, Bathers at Asnieres
 - Georgia O’Keeffe, The Lawrence Tree
 - Gerhard Richter, Betty
 - Getting a Seed Round from a VC
 - Getting At Least One Heads
 - Getting Exactly Two Heads (Combinatorics)
 - Getting to 10 by Filling Boxes
 - Gibbs Free Energy and Spontaneity
 - Gibbs Free Energy Example
 - Giorgione, The Tempest
 - Giotto, Scrovegni Chapel, Padua, (Part 1)
 - Giotto, Scrovegni Chapel, Padua, (Part 2)
 - Giotto, Scrovegni Chapel, Padua, (Part 3)
 - Giotto, Scrovegni Chapel, Padua, (Part 4)
 - Giovanni Bernini, Bust of Medusa
 - Giovanni Bernini, David
 - Giovanni Bernini, Ecstasy of St. Teresa
 - Giovanni Bernini, Sant’Andrea al Quirinale
 - Glucose Concentration Conversion
 - Glucose, Insulin and Diabetes
 - Glycolysis
 - Going Back to the Till: Series B
 - Golden Stool (Sika Dwa Kofi)
 - Government Spending and the IS-LM Model
 - Government’s Financial Condition
 - Grant Wood, American Gothic
 - Graph of the sine function
 - Graphical Relations and Functions
 - Graphical Slope of a Line
 - Graphical System of Inequalities
 - Graphical Systems Application Problem
 - Graphing a Basic Function
 - Graphing a line in slope intercept form
 - Graphing a Quadratic Function
 - Graphing Exponential Functions
 - Graphing Hundredths on a Number Line
 - Graphing Inequalities 1
 - Graphing Inequalities 2
 - Graphing linear inequalities in two variables 2
 - Graphing linear inequalities in two variables 3
 - Graphing Linear Inequalities in Two Variables Example 2
 - Graphing Logarithmic Functions
 - Graphing Natural Logarithm Function
 - Graphing Proportional Relationships (Example 1)
 - Graphing Proportional Relationships (Example 2)
 - Graphing Proportional Relationships (Example 3)
 - Graphing Radical Functions
 - Graphing Systems of Equations
 - Graphing Systems of Inequalities
 - Graphing systems of inequalities
 - Graphing systems of inequalities 2
 - Graphing systems of inequalities 3
 - Graphing trig functions
 - Graphing Using X and Y Intercepts
 - Graphs of trig functions
 - Gravitation (Part 2)
 - Gravity for Astronauts in Orbit
 - Greater Than and Less Than Symbols
 - Greatest Common Divisor
 - Greatest Common Factor
 - Greek Debt Recession and Austerity (Part 1)
 - Greek Financial Crisis (Part 2)
 - Gross and Net Income: Anatomy of a Paycheck
 - Groups of the Periodic Table
 - Growing by a percentage
 - Gustav Klimt, Beethoven Frieze
 - Gustav Klimt, Death and Life
 - Gustav Klimt, The Kiss
 - Hagia Sophia as a Mosque
 - Hagia Sophia, Istanbul
 - Hairier Slope of Line
 - Haitian Revolution (Part 1)
 - Haitian Revolution (Part 2)
 - Half-Life
 - Halves and Fourths of Shapes
 - Hannah Hoch, Cut with the Kitchen Knife
 - Hans Holbein the Younger, Portrait of Henry VIII
 - Hans Holbein the Younger, The Ambassadors
 - Hardy-Weinberg Principle
 - Harmonic Motion Part 2 (Calculus)
 - Harmonic Motion Part 3 (No Calculus)
 - Hawaiian Islands Formation
 - Head of Augustus
 - Health Care Community Liaison: How I Got My Job and Where I’m Going
 - Health Care Community Liaison: My Budget and Planning for the Future
 - Health Care Community Liaison: What I Do and How Much I Make
 - Health Care Costs in US vs Europe
 - Healthcare System Overview
 - Heart Disease and Heart Attacks
 - Heat of Formation
 - Hector Guimard, City Entrance, Paris Metropolitain
 - Hedge Fund Intro
 - Hedge Fund Strategies - Long Short 1
 - Hedge Fund Strategies - Long Short 2
 - Hedge Fund Strategies - Merger Arbitrage 1
 - Hedge Fund Structure and Fees
 - Hedge Funds, Venture Capital, and Private Equity
 - Helper T Cells
 - Hemoglobin
 - Henri Cartier-Bresson, Behind the Gare Saint-Lazare, Paris
 - Henri de Toulouse-Lautrec, At the Moulin Rouge
 - Henri Matisse, Luxe, Calme et Volupte
 - Henri Matisse, The Piano Lesson
 - Henri Matisse, The Red Studio
 - Heron’s Formula
 - Hess’s Law and Reaction Enthalpy Change
 - Hess’s Law Example
 - Heterogeneous Equilibrium
 - Highly Selective vs. Selective vs. Nonselective Colleges
 - Home Equity Loans
 - House Altar Depicting Akhenaten, Nefertiti and Three Daughters
 - Housing  Price Conundrum (Part 2)
 - Housing  Price Conundrum (Part 3)
 - Housing Conundrum (Part 4)
 - How and Why Greece Would Leave the Euro (Part 3)
 - How Earth’s Tilt Causes Seasons
 - How Many People to Hire Given the MPR Curve
 - How One-Point Linear Perspective Works
 - How to Approximate Square Roots
 - How to Calculate Interquartile Range (IQR)
 - How to Classify Numbers
 - How to Create a Histogram
 - How to Describe Real-World Situations with Inequalities
 - How to Evaluate Expressions with Two Variables (Example 1)
 - How to Evaluate Expressions with Two Variables (Example 2)
 - How to Find a Missing Value Given the Mean
 - How to Find Equivalent Expressions by Combining Like Terms and Using the Distributive Property
 - How to Find Mistakes in One-Step Equations
 - How to Find the Area of a Strange Quadrilateral on a Grid
 - How to Find the Area of a Triangle on a Grid
 - How to Interpret a Histogram
 - How to Make a Scale Drawing
 - How to Measure Volume
 - How to Plot Inequalities on a Number Line
 - How to Read a Line Plot that Uses Fractions
 - How to Solve One-Step Equations with Fractions and Decimals
 - How to Solve One-Step Multiplication and Division Equations with Fractions and Decimals
 - How to Solve Two-Step Linear Equations with Decimals and Fractions
 - How to Test Solutions to Equations Using Substitution
 - How to Test Solutions to Inequalities
 - How to Use the Distributive Property to Factor Out the Greatest Common Factor
 - How to Use the Distributive Property with Variables
 - How to Visually Identify Proportional Relationships Using Graphs
 - How to Write Basic Expressions with Variables
 - How to Write One-Step Equations for Word Problems
 - How We Know About the Earth’s Core
 - HTML/JS: Making Webpages Interactive with jQuery: DOM Access with jQuery
 - HTML/JS: Making Webpages Interactive with jQuery: DOM Animation & Effects with jQuery
 - HTML/JS: Making Webpages Interactive with jQuery: DOM Events with jQuery
 - HTML/JS: Making Webpages Interactive with jQuery: DOM Modification with jQuery
 - HTML/JS: Making Webpages Interactive with jQuery: Form Processing with jQuery
 - HTML/JS: Making Webpages Interactive with jQuery: Further Learning
 - HTML/JS: Making Webpages Interactive with jQuery: jQuery Techniques
 - HTML/JS: Making Webpages Interactive with jQuery: Welcome to jQuery
 - HTML/JS: Making Webpages Interactive: DOM Access Methods
 - HTML/JS: Making Webpages Interactive: DOM Animation
 - HTML/JS: Making Webpages Interactive: DOM Events
 - HTML/JS: Making Webpages Interactive: DOM Modification
 - HTML/JS: Making Webpages Interactive: Further Learning
 - HTML/JS: Making Webpages Interactive: Get Ready to Make Your Webpages Interactive
 - HTML/JS: Making Webpages Interactive: JS and the DOM
 - HTML/JS: Making Webpages Interactive: Using JS Libraries in your Webpage
 - Hubble Image of Galaxies
 - Hubble’s Law
 - Human Capital
 - Human Evolution Overview
 - Human Resources Management & Program Analyst: How I Got My Job and Where I’m Going
 - Human Resources Management & Program Analyst: How I Paid for College
 - Human Resources Management & Program Analyst: What I Do and How Much I Make
 - Hundred Days and Waterloo
 - Hydrogen Peroxide Correction
 - Hyperinflation
 - Hyperplasia in Colon Tissue
 - Hypothesis Test Comparing Population Proportions
 - Hypothesis Test for the Difference of Two Means
 - Hypothesis Testing for a Mean
 - i as the Principal Root of -1 (a little technical)
 - Ice Accelerating Down an Incline
 - Idea Behind Hypothesis Testing
 - Idea of Division, The
 - Ideal Gas Equation: Example 1
 - Ideal Gas Equation: Example 2
 - Ideal Gas Equation: Example 3
 - Ideal Gas Equation: PV=nRT
 - Ideal Gas Example 4
 - Identify the Angle
 - Identifying a Proportional Relationship from a Table
 - Identifying Complementary and Supplementary Angles
 - Identifying Conics 1
 - Identifying Conics 2
 - Identifying Fraction Parts
 - Identifying Geometric Solids
 - Identifying Hundredths on a Number Line
 - Identifying Parallel and Perpendicular Lines
 - Identifying Percent Amount and Base
 - Identifying Rational Numbers
 - Identifying Rays
 - Identifying Symmetrical Figures
 - Identifying Tenths on a Number Line
 - Identifying Type I and Type II Errors in Hypothesis Testing
 - Identifying Unit Fractions Word Problem
 - Identity Property of 0
 - Identity Property of 1
 - Identity Property of 1 (Second Example)
 - IIT JEE Trigonometric Constraints
 - IIT JEE Trigonometric Maximum
 - IIT JEE Trigonometry Problem 1
 - Images and Power: Francisco Goya’s Third of May, 1808
 - Imaginary Roots of Negative Numbers
 - Impact of a Radius Change on the Area of a Circle
 - Impact on Median and Mean when Increasing Highest Value
 - Impact on Median and Mean when Removing Lowest Value
 - Impact Veolocity From Given Height
 - Incenter and incircles of a triangle
 - Inclined Plane Force Components
 - Income and Expenditure Views of GDP
 - Increasing Opportunity Cost
 - Independent and Dependent Systems
 - Independent Events 1
 - Independent Events 2
 - Independent Events 3
 - Inductive Patterns
 - Inductive Reasoning 1
 - Inductive Reasoning 2
 - Inductive Reasoning 3
 - Inequalities
 - Inequalities on a Number Line
 - Inferior Goods Clarification
 - Inferring Population Mean from Sample Mean
 - Inflammation
 - Inflammatory Response
 - Inflation & Deflation3: Obama Stimulus Plan
 - Inflation Data
 - Inflation Overview
 - Inflation, Deflation & Capacity Utilization
 - Inflation, Deflation & Capacity Utilization 2
 - Information Security and Forensics Analyst: How I Got My Job
 - Information Security and Forensics Analyst: What I Do
 - Inradius Perimeter and Area
 - Inscribed and Central Angles
 - Institutional Critique: Hans Haacke’s Seurat’s Les Poseuses (Small Version), 1884-1975
 - Institutional Roles in Issuing and Processing Credit Cards
 - Instructional Designer: My Budget and Planning for the Future
 - Instructional Designer: What I Do and How Much I Make
 - Integer Equations to Describe a Diagram
 - Integer sums
 - Interactive Module: Finding Factors
 - Interest (Part 2)
 - Interest as Rent for Money
 - Interest Rate Swap 1
 - Interest Rate Swap 2
 - Interesting Perimeter and Area Problems
 - Interesting Polynomial Coefficient Problem
 - Intergalactic Scale
 - Internet 101: Cybersecurity and Crime
 - Internet 101: Encryption and Public Keys
 - Internet 101: How the Internet Works
 - Internet 101: HTTP and HTML
 - Internet 101: IP Addresses and DNS
 - Internet 101: Packet, Routers and Reliability
 - Internet 101: Wires, Cables and WiFi
 - Interpreting a Linear Graph Word Problem
 - Interpreting a Linear Table Word Problem
 - Interpreting a Scale Drawing
 - Interpreting a Trend Line
 - Interpreting Absolute Value as Distance
 - Interpreting Absolute Value in Real World Problems
 - Interpreting Bar Graphs: Alligators
 - Interpreting Bar Graphs: Colors
 - Interpreting Box Plots
 - Interpreting Futures Fair Value in the Premarket
 - Interpreting Graphs of Proportional Relationships
 - Interpreting Inequalities
 - Interpreting Integer Expressions on a Number Line
 - Interpreting Linear Expressions (Example 1)
 - Interpreting Linear Expressions (Example 2)
 - Interpreting Linear Graphs
 - Interpreting Multiplication and Division of Negative Numbers
 - Interpreting Negative Number Statements
 - Interpreting Picture Graphs: Notebook
 - Interpreting Picture Graphs: Paint
 - Interpreting the Graph of a Function
 - Interpreting Two-Way Relative Frequency Tables
 - Intro to 30-60-90 Triangles
 - Intro to Springs and Hooke’s Law
 - Intro to the Endocrine System
 - Introduction to Addition
 - Introduction to Addition Using Groups of 10
 - Introduction to angles (old)
 - Introduction to Area and Unit Squares
 - Introduction to Balance Sheets
 - Introduction to Bonds
 - Introduction to Cellular Respiration
 - Introduction to Chi-Square Distribution
 - Introduction to Comparing Fractions with Different Denominators
 - Introduction to Compound Interest
 - Introduction to Compound Interest and e
 - Introduction to Conic Sections
 - Introduction to Cube Roots
 - Introduction to Decimals
 - Introduction to Eigenvalues and Eigenvectors
 - Introduction to Equivalent Fractions
 - Introduction to Even and Odd Numbers
 - Introduction to Evolution and Natural Selection
 - Introduction to Exponential Decay
 - Introduction to Exponents
 - Introduction to Function Inverses
 - Introduction to functions
 - Introduction to Gravity
 - Introduction to Harmonic Motion
 - Introduction to Heredity
 - Introduction to HTML/CSS: Making Webpages: CSS Layout
 - Introduction to HTML/CSS: Making Webpages: CSS Text Properties
 - Introduction to HTML/CSS: Making Webpages: Further Learning
 - Introduction to HTML/CSS: Making Webpages: Introduction to CSS
 - Introduction to HTML/CSS: Making Webpages: Introduction to HTML
 - Introduction to HTML/CSS: Making Webpages: More CSS Selectors
 - Introduction to HTML/CSS: Making Webpages: More HTML Tags
 - Introduction to HTML/CSS: Making Webpages: Other Ways to Embed CSS
 - Introduction to HTML/CSS: Making Webpages: Web Development Tools
 - Introduction to i and Imaginary Numbers
 - Introduction to Inflation
 - Introduction to Interest
 - Introduction to JS: Drawing & Animation: Animation Basics
 - Introduction to JS: Drawing & Animation: Arrays
 - Introduction to JS: Drawing & Animation: Becoming a Better Programmer
 - Introduction to JS: Drawing & Animation: Coloring
 - Introduction to JS: Drawing & Animation: Debugging Programs
 - Introduction to JS: Drawing & Animation: Drawing Basics
 - Introduction to JS: Drawing & Animation: Functions
 - Introduction to JS: Drawing & Animation: Interactive Programs
 - Introduction to JS: Drawing & Animation: Introduction to Programming
 - Introduction to JS: Drawing & Animation: Logic and If Statements
 - Introduction to JS: Drawing & Animation: Looping
 - Introduction to JS: Drawing & Animation: Object-Oriented Design
 - Introduction to JS: Drawing & Animation: Objects
 - Introduction to JS: Drawing & Animation: Resizing with Variables
 - Introduction to JS: Drawing & Animation: Texts and Strings
 - Introduction to JS: Drawing & Animation: Variables
 - Introduction to JS: Drawing & Animation: Writing Clean Code
 - Introduction to Kinetics
 - Introduction to Light
 - Introduction to Limits
 - Introduction to Limits (HD)
 - Introduction to Line Plots
 - Introduction to Logarithm Properties
 - Introduction to Logarithm Properties (Part 2)
 - Introduction to Logarithms
 - Introduction to Magnetism
 - Introduction to Mechanical Advantage
 - Introduction to Medieval Scripts, An
 - Introduction to Momentum
 - Introduction to Mortgage Loans
 - Introduction to Multiplication
 - Introduction to Multiplying Decimals
 - Introduction to Negative Exponents (Part 1)
 - Introduction to Negative Exponents (Part 2)
 - Introduction to Newton’s Law of Gravitation
 - Introduction to Order of Operations
 - Introduction to Oxidation States
 - Introduction to Perimeter
 - Introduction to pH, pOH, and pKw
 - Introduction to Place Value
 - Introduction to Present Value
 - Introduction to Proportional Relationships
 - Introduction to Random Variables
 - Introduction to Rates
 - Introduction to Rational and Irrational Numbers
 - Introduction to Ratios
 - Introduction to Ratios (Apples and Oranges)
 - Introduction to Ratios (New HD Version)
 - Introduction to Sampling Distributions
 - Introduction to SQL: Querying and Managing Data: Further Learning in SQL
 - Introduction to SQL: Querying and Managing Data: Modifying Databases with SQL
 - Introduction to SQL: Querying and Managing Data: More Advanced SQL Queries
 - Introduction to SQL: Querying and Managing Data: Relational Queries in SQL
 - Introduction to SQL: Querying and Managing Data: SQL Basics
 - Introduction to Square Roots
 - Introduction to Subtraction
 - Introduction to Tension
 - Introduction to the Atom
 - Introduction to the Doppler Effect
 - Introduction to the Income Statement
 - Introduction to the Price-to-Earnings Ratio
 - Introduction to the Protestant Reformation, Part 1: Setting the Stage
 - Introduction to the Protestant Reformation, Part 2: Martin Luther
 - Introduction to the Protestant Reformation, Part 3: Varieties of Protestantism
 - Introduction to the Protestant Reformation, Part 4: The Counter-Reformation
 - Introduction to the quadratic equation
 - Introduction to the Yield Curve
 - Introduction to Torque
 - Introduction to Transformations on the Coordinate Plane
 - Introduction to Types of Quadrilaterals
 - Introduction to Vectors and Scalars
 - Introduction to Waves
 - Introduction to Work and Energy
 - Intuition on Static and Kinetic Friction Comparisons
 - Inverse Property of Addition
 - Inverse Property of Multiplication
 - Inverse Trig Functions: Arccos
 - Inverse Trig Functions: Arcsin
 - Inverse Trig Functions: Arctan
 - Inverse Variation Application
 - Investment and Consumption
 - Investment and Real Interest Rates
 - Investment vs. Consumption 1
 - Investment vs. Consumption 2
 - Ionic, Covalent, and Metallic Bonds
 - Is Limited Liability or Double Taxation Fair
 - Is Short Selling Bad?
 - Jackie Winsor, #1 Rope
 - Jackson Pollock, One: Number 31, 1950
 - Jacob Lawrence, The Migration Series
 - Jacopo Tintoretto, The Last Supper
 - Jacques-Louis David, The Death of Marat
 - Jacques-Louis David, The Emperor Napoleon in His Study at the Tuileries
 - Jacques-Louis David, The Lictors Returning to Brutus the Bodies of His Sons
 - Jacques-Louis David, The Oath of the Horatii
 - Jan van Eyck, Ghent Altarpiece
 - Jan van Eyck, Portrait of Giovanni Arnolfini and His Wife
 - Jan van Eyck, The Madonna in the Church
 - Jasper Johns, Flag
 - Jean (Hans) Arp, Untitled
 - Jean Courbet, A Burial at Ornans
 - Jean Courbet, The Artist’s Studio
 - Jean-Francois Millet, The Gleaners
 - Jean-Honore Fragonard, The Progress of Love: The Meeting
 - Jean-Honore Fragonard, The Swing
 - Johannes Vermeer, Girl with a Pearl Earring
 - Johannes Vermeer, The Art of Painting
 - Johannes Vermeer, Young Woman with a Water Pitcher
 - John Baldessari, I Will Not Make Any More Boring Art
 - John Constable, The Hay Wain
 - John Everett Millais, Christ in the House of His Parents
 - John Everett Millais, Ophelia
 - John Singer Sargent, Carnation, Lily, Lily, Rose
 - John Singleton Copley, A Boy with a Flying Squirrel (Henry Pelham)
 - Joint Variation Application
 - Jose Maria Velasco, The Valley of Mexico from the Santa Isabel Mountain Range
 - Joseph Turner, Rain, Steam and Speed: The Great Western Railway
 - Joseph Turner, Slave Ship (Slavers Throwing Overboard the Dead and Dying, Typhoon Coming On)
 - Joshua Reynolds, Lady Cockburn and Her Three Eldest Sons
 - Journey into Cryptography: Algorithmic Efficiency
 - Journey into Cryptography: Ancient Cryptography
 - Journey into Cryptography: Ciphers
 - Journey into Cryptography: Cryptography Challenge 101
 - Journey into Cryptography: Diffie-Hellman Key Exchange
 - Journey into Cryptography: Euler’s Totient Function
 - Journey into Cryptography: Fermat Primality Test
 - Journey into Cryptography: Fermat’s Little Theorem
 - Journey into Cryptography: Frequency Stability Property Short Film
 - Journey into Cryptography: Introduction to Randomized Algorithms
 - Journey into Cryptography: Modern Cryptography
 - Journey into Cryptography: Modular Arithmetic
 - Journey into Cryptography: Perfect Secrecy
 - Journey into Cryptography: Polyalphabetic Cipher
 - Journey into Cryptography: Primality Test
 - Journey into Cryptography: Primality Test Challenge
 - Journey into Cryptography: Primality Test with Sieve
 - Journey into Cryptography: Pseudorandom Number Generators
 - Journey into Cryptography: Public Key Cryptography: What Is It?
 - Journey into Cryptography: Random Primality Test (Warm-Up)
 - Journey into Cryptography: Randomized Algorithms
 - Journey into Cryptography: RSA Encryption: Step 1
 - Journey into Cryptography: RSA Encryption: Step 2
 - Journey into Cryptography: RSA Encryption: Step 3
 - Journey into Cryptography: RSA Encryption: Step 4
 - Journey into Cryptography: Sieve of Eratosthenes
 - Journey into Cryptography: Summary (What’s Next?)
 - Journey into Cryptography: The Caesar Cipher
 - Journey into Cryptography: The Discrete Logarithm Problem
 - Journey into Cryptography: The Enigma Encryption Machine
 - Journey into Cryptography: The Fundamental Theorem of Arithmetic
 - Journey into Cryptography: The One-Time Pad
 - Journey into Cryptography: The Prime Number Theorem
 - Journey into Cryptography: Time Space Tradeoff
 - Journey into Cryptography: What Is Computer Memory?
 - Journey into Cryptography: What Is Cryptography?
 - Journey into Information Theory: A Mathematical Theory of Communication
 - Journey into Information Theory: Ancient Information Theory
 - Journey into Information Theory: Compression Nodes
 - Journey into Information Theory: Electrostatic Telegraphs (Case Study)
 - Journey into Information Theory: Error Correction
 - Journey into Information Theory: History of the Alphabet
 - Journey into Information Theory: Information Entropy
 - Journey into Information Theory: Introduction to Channel Capacity
 - Journey into Information Theory: Measuring Information
 - Journey into Information Theory: Modern Information Theory
 - Journey into Information Theory: Morse Code and the Information Age
 - Journey into Information Theory: Origin of Markov Chains
 - Journey into Information Theory: Origins of Written Language
 - Journey into Information Theory: Source Encoding
 - Journey into Information Theory: Symbol Rate
 - Journey into Information Theory: The Battery and Electromagnetism
 - Journey into Information Theory: The Search for Extraterrestrial Intelligence
 - Journey into Information Theory: Visual Telegraphs (Case Study)
 - Journey into Information Theory: What Is Information Theory?
 - Judgement in the Presence of Osiris, Book of the Dead
 - Judicial Staff Attorney: How I Got My Job and Where I’m Going
 - Judicial Staff Attorney: My Budget and Planning for the Future
 - Judicial Staff Attorney: What I Do and How Much I Make
 - Judith Leyster, Self-Portrait
 - Justification for |a - b| = |b - a|
 - K-Ar Dating Calculation
 - Kayapo Headdress
 - Keq Derivation Intuition
 - Keq Intuition
 - Keynesian Cross
 - Keynesian Cross and the Multiplier
 - Keynesian Economics
 - Koch Snowflake Fractal
 - Korean War Overview
 - Krebs / Citric Acid Cycle
 - Kunz Axe
 - Kurt Schwitters, Merzbild 32A, The Cherry Picture
 - Lab Technician: How I Got My Job and Where I’m Going
 - Lab Technician: My Budget and Planning for the Future
 - Lab Technician: What I Do and How Much I Make
 - Land Productivity Limiting Human Population
 - Language and Notation of Basic Geometry
 - Language and Notation of the Circle
 - Language of Representation, The: Pablo Picasso’s Guitar
 - Laszlo Moholy-Nagy, Climbing the Mast
 - Laszlo Moholy-Nagy, Composition A.XX
 - Lattice Multiplication
 - Launching and Landing on Different Elevations
 - Law Code Stele of King Hammurabi
 - Law of cosines
 - Law of Demand
 - Law of Large Numbers
 - Law of Supply
 - Le Chatelier’s Principle
 - Least Common Multiple (Example 1)
 - Least Common Multiple (Example 2)
 - Least Common Multiple (LCM)
 - Least Common Multiple and Greatest Common Factor Word Problems
 - LeBron Asks About Comparing Earth’s History to a Basketball Game
 - LeBron asks about free throws versus three pointers
 - LeBron Asks About Newton’s 3rd Law
 - LeBron asks about the chances of making 10 free throws
 - LeBron Asks:  What Muscles Do We Use When Shooting a Basket?
 - LeBron Asks: Why Does Humidity Make it Feel Hotter?
 - LeBron Asks: Why Does Sweating Cool You Down?
 - Length of a Line Segment Using Linear Equations
 - Length Word Problems
 - Leonardo da Vinci’s Letter to the Duke of Milan
 - Leonardo da Vinci, Adoration of the Magi
 - Leonardo da Vinci, The Last Supper
 - Leonardo da Vinci, The Virgin of the Rocks
 - Level 1 Exponents
 - Level 1 multiplying expressions
 - Level 2 Addition
 - Level 2 Exponents
 - Level 3 Exponents
 - Level 4 Division
 - Level 4 Subtraction
 - LIBOR
 - Licensed Clinical Social Worker: How I Got My Job and Where I’m Going
 - Licensed Clinical Social Worker: My Budget and Planning for the Future
 - Licensed Clinical Social Worker: What I Do and How Much I Make
 - Life Cycle of Massive Stars
 - Limit Examples (part 1)
 - Limit Examples (part 2)
 - Limit Examples (part3)
 - Limit Examples w/ brain malfunction on first prob (part 4)
 - Limiting Reactant Example Problem 1
 - Linear and Nonlinear Functions (Example 1)
 - Linear and Nonlinear Functions (Example 2)
 - Linear and Nonlinear Functions (Example 3)
 - Linear Equation Word Problem: Computer Store
 - Linear Equation Word Problem: Orange Trees
 - Linear Perspective: Filippo Brunelleschi’s Experiement
 - Lines, Line Segments, and Rays
 - Liquid Volume (Capacity) Problems
 - LM Part of the IS-LM Model
 - Loanable Funds Interpretation of IS Curve
 - Locate Integers on a Number Line
 - Logarithm of a Power
 - Logarithmic Equations
 - Logarithmic Equations 2
 - Logarithmic Scale
 - Long Division with Decimals
 - Long Straddle
 - Long Term Supply Curve and Economic Profit
 - Long-Run Aggregate Supply
 - Loop De Loop Answer (Part 1)
 - Loop De Loop Answer (Part 2)
 - Loop De Loop Question
 - Lower Bound on Forward Settlement Price
 - Lyonel Feininger, Cathedral for Program of the State Bauhaus in Weimar
 - Mach Numbers
 - Macrostates and Microstates
 - Magentism 5
 - Magnetism 10: Electric Motors
 - Magnetism 11: Electric Motors
 - Magnetism 12: Induced Current in a Wire
 - Magnetism 2
 - Magnetism 3
 - Magnetism 4
 - Magnetism 6:  Magnetic Field Due to Current
 - Magnetism 7
 - Magnetism 8
 - Magnetism 9: Electric Motors
 - Making 5
 - Making Picture Graphs and Line Plots
 - Making Predictions with Probability
 - Making Sense of Complex Fractions
 - Making the College Transition
 - Making the Most of High School Classes
 - Managing Your Debt Level
 - Marcel Duchamp’s Shovel: Art as Concept
 - Marcel Duchamp, Fountain
 - Marcel Duchamp, The Red Box (Boite-en-Valise), Series F
 - Margin of Error (Example 1)
 - Margin of Error (Example 2)
 - Marginal Cost and Average Total Cost
 - Marginal Revenue and Marginal Cost
 - Marginal Revenue Below Average Total Cost
 - Marginal Utility
 - Mark Rothko, No. 3/No. 13
 - Market Capitalization
 - Market Equilibrium
 - Market Value of Assets
 - Marketing Client Manager: How I Got My Job and Where I’m Going
 - Marketing Client Manager: My Budget and Planning for the Future
 - Marketing Client Manager: What I Do and How Much I Make
 - Marking Data on Line Plots
 - Mary Cassatt, In the Loge
 - Mary Cassatt, The Child’s Bath
 - Mary Cassatt, The Loge
 - Mary Cassatt, Woman with a Pearl Necklace in a Loge
 - Masaccio, Holy Trinity
 - Mask of Agamemnon, Mycenae
 - Mass and Weight Clarification
 - Mass Problems
 - Math Mechanics of Thai Banking Crisis
 - Math Patterns (Example 1)
 - Math Patterns (Example 2)
 - Mathy Versions of MPC and Multiplier (Optional)
 - Maxwell’s Demon
 - Maya Lin, Vietnam Veterans Memorial
 - Mean Absolute Deviation (Example 1)
 - Mean Absolute Deviation (Example 2)
 - Mean Median and Mode
 - Measures of Center
 - Measuring a Golden Statue
 - Measuring Angles
 - Measuring Angles in Degrees
 - Measuring Angles with a Circular Protractor
 - Measuring Area with Partial Unit Squares
 - Measuring Lengths
 - Measuring Lengths with Different Units
 - Measuring the Same Rectangle with Different Unit Squares
 - Measuring Volume as Area Times Length
 - Measuring Volume in Unit Cubes by Decomposing a Shape
 - Measuring Volume Through Decomposition
 - Measuring Volume with Unit Cubes
 - Mechanical Advantage (Part 2)
 - Mechanical Advantage (Part 3)
 - Median and Range Word Problem
 - Median Centroid Right Triangle Example
 - Medians divide into smaller triangles of equal area
 - Medical Resident: How I Got My Job and Where I’m Going
 - Medical Resident: My Budget and Planning for the Future
 - Medical Resident: What I Do and How Much I Make
 - Medicare Overview
 - Medicare Sustainability
 - Medieval Textbook, A
 - Meet the Professional
 - Mega Millions Jackpot Probability
 - Mental Technique for Subtraction Without Regrouping
 - Message to Parents on Paying for College, A
 - Metric System: Units of Distance
 - Metric System: Units of Volume
 - Metric System: Units of Weight
 - Michelangelo Caravaggio, Calling of St. Matthew
 - Michelangelo Caravaggio, Contarelli Chapel, San Luigi dei Francesi, Rome
 - Michelangelo Caravaggio, The Supper at Emmaus
 - Michelangelo’s Early Work
 - Michelangelo, David
 - Michelangelo, Last Judgment
 - Michelangelo, Laurentian Library
 - Michelangelo, Pieta
 - Michelangelo, Sistine Chapel Ceiling
 - Mies van der Rohe, Seagram Building, New York City
 - Milankovitch Cycles Precession and Obliquity
 - Mini-Video on Ion Size
 - Minimum Wage and Price Floors
 - Misleading Line Graphs
 - Missing Measurements for Similar Triangles
 - Missing Number for Addition and Subtraction Within 1,000
 - Missing Numbers in Addition and Subtraction Within 100
 - Missing Value Addition and Subtraction Problems with Negative Numbers (Example 1)
 - Missing Value Addition and Subtraction Problems with Negative Numbers (Example 2)
 - Mistakes in Solving Equations
 - Mitosis, Meiosis, and Sexual Reproduction
 - Mixed Numbers and Improper Fractions
 - Mixed Numbers on a Number Line
 - Mixture problems 1
 - Mixture problems 2
 - Mixture problems 3
 - Moderate Inflation in a Good Economy
 - Molecular and Empirical Formulas
 - Molecular and Empirical Formulas from Percent Composition
 - Moments
 - Moments (Part 2)
 - Momentum:  Ice Skater Throws a Ball
 - Monetary and Fiscal Policy
 - Money Supply - M0 M1 and M2
 - Money Supply and Demand Impacting Interest Rates
 - Money Word Problem: Currency Conversion
 - Money Word Problem: Making Change
 - Monomial Greatest Common Factor
 - Monopolist Optimizing Price (Part 1) - Total Revenue
 - Monopolist Optimizing Price (Part 2) - Marginal Revenue
 - Monopolist Optimizing Price (Part 3) - Dead Weight Loss
 - Monopolistic Competition and Economic Profit
 - Monopoly Basics
 - More advanced ratio problem--with Algebra (HD version)
 - More Comparison Word Problems
 - More Complicated Order of Operations Example
 - More Exponential Decay Examples
 - More Involved Multi-Step Equation
 - More Limits
 - More Multiplying Polynomials
 - More on Balance Sheets and Equity
 - More on Elasticity of Demand
 - More on Entropy
 - More on Equivalent Fractions
 - More on Final and Intermediate GDP Contributions
 - More on Internal Energy
 - More on IPOs
 - More on Nash Equilibrium
 - More on Orbitals and Eletron Configuration
 - More on Oxidation States
 - More on Quantitative Easing (and Credit Easing)
 - More on Significant Figures
 - More on the Concept of Multiplication
 - More on Total Revenue and Elasticity
 - More on why SSA is not a postulate
 - More percent problems
 - More Rational Exponents and Exponent Laws
 - More Rigorous Gibbs Free Example / Spontaneity Relationship
 - More trig graphs
 - More Ways to Think About Multiplying
 - Mortgage Back Security Overview
 - Mortgage Interest Rates
 - Mortgage-Backed Securities I
 - Mortgage-Backed Securities II
 - Mortgage-Backed Securities III
 - Mortuary Temple of Hatshepsut and Large Kneeling Statue, New Kingdom, Egypt
 - Motivation for the Futures Exchange
 - MPC and Multiplier
 - Multi-Step Equations 1
 - Multi-Step Equations 2
 - Multi-Step Inequalities
 - Multi-Step Inequalities 2
 - Multiplication 2: The Multiplication Tables
 - Multiplication 3: 10, 11,12 Times Tables
 - Multiplication 5: 2-Digit times a 2-Digit Number
 - Multiplication 6: Multiple Digit Numbers
 - Multiplication 7: Old Video Giving More Examples
 - Multiplication 8: Multiplying Decimals (Old Video)
 - Multiplication and Division Word Problems: Blueberries for Friends
 - Multiplication and Division Word Problems: Building Height
 - Multiplication and Division Word Problems: How Much Soda?
 - Multiplication and Division Word Problems: Marbles for Friends
 - Multiplication and Division Word Problems: Parking Lot
 - Multiplication and Division Word Problems: Party Guests
 - Multiplication and Division Word Problems: Running Distance
 - Multiplication and Division Word Problems: Theater Seats
 - Multiplication as Groups of Objects
 - Multiplication Word Problems: Pieces of Pizza
 - Multiply and Simplify a Radical Expression 1
 - Multiply and Simplify a Radical Expression 2
 - Multiplying 1-Digit Numbers by 10, 100 and 1,000
 - Multiplying 1-Digit Numbers by Multiples of 10, 100 and 1,000
 - Multiplying a Decimal by a Power of 10
 - Multiplying and Dividing Even and Odd Numbers of Negative Factors
 - Multiplying and Dividing in Scientific Notation
 - Multiplying and Dividing Monomials 1
 - Multiplying and Dividing Monomials 2
 - Multiplying and Dividing Monomials 3
 - Multiplying and Dividing Rational Expressions 1
 - Multiplying and Dividing Rational Expressions 2
 - Multiplying and Dividing Rational Expressions 3
 - Multiplying and Dividing with Significant Figures
 - Multiplying and Simplifying Rational Expressions
 - Multiplying Binomials
 - Multiplying Binomials With Radicals
 - Multiplying by Multiples of 10
 - Multiplying by Tens Word Problem
 - Multiplying Challenging Decimals
 - Multiplying Complex Numbers
 - Multiplying Decimals
 - Multiplying Decimals 3
 - Multiplying Decimals: Place Value and Reordering
 - Multiplying Fractions
 - Multiplying Fractions (Old)
 - Multiplying Fractions and Mixed Numbers
 - Multiplying Fractions and Whole Numbers: Two Approaches
 - Multiplying Fractions by Whole Numbers on the Number Line
 - Multiplying Fractions Word Problem
 - Multiplying Fractions Word Problem: Bike Ride
 - Multiplying Fractions Word Problem: Drinking Milk
 - Multiplying Fractions Word Problem: Laundry Detergent
 - Multiplying Fractions Word Problem: Movie Marathon
 - Multiplying Fractions Word Problem: Science Project
 - Multiplying Fractions Word Problems ( ex 1)
 - Multiplying in Scientific Notation
 - Multiplying Mixed Numbers
 - Multiplying Mixed Numbers 1 (ex1)
 - Multiplying Monomials
 - Multiplying Monomials by Polynomials
 - Multiplying Multiples of 10
 - Multiplying Multiples of Powers of 10
 - Multiplying Negative and Positive Fractions
 - Multiplying Negative Real Numbers
 - Multiplying Polynomials
 - Multiplying Polynomials 2
 - Multiplying Polynomials 3
 - Multiplying Polynomials1
 - Multiplying Real Number Application
 - Multiplying Two Fractions
 - Multiplying Two Fractions Using a Number Line
 - Multiplying Unit Fractions and Whole Numbers
 - Multiplying Whole Numbers and Applications 1
 - Multiplying Whole Numbers and Applications 2
 - Multiplying Whole Numbers and Applications 3
 - Multiplying Whole Numbers and Applications 4
 - Multiplying Whole Numbers and Applications 5
 - Multiplying Whole Numbers and Applications 6
 - Multiplying Whole Numbers by 10
 - Multiplying: 2-Digit Number x 1-Digit Number
 - Multiplying: 2-Digit Number x 1-Digit Number (with Carrying)
 - Multiplying: 2-Digit Numbers
 - Multiplying: 2-Digit Numbers (Using the Distributive Property)
 - Multiplying: 3-Digit Number x 1-Digit Number
 - Multiplying: 3-Digit Number x 1-Digit Number (with Carrying)
 - Multiplying: 4-Digit Number x 1 Digit Number (Using a Grid)
 - Multiplying: 4-Digit Number x 1-Digit Number (with Carrying)
 - Multiplying: Using an Area Model (Example 1)
 - Multiplying: Using an Area Model (Example 2)
 - Myosin and Actin
 - Myron of Eleutherae, Discobolus (Discus Thrower)
 - Naming Angles
 - Napoleon and the War of the Fourth Coalition
 - Napoleon and the War of the Third Coalition
 - Napoleon and the Wars of the First and Second Coalitions
 - Napoleon Forced to Abdicate
 - Napoleon’s Peninsular Campaigns
 - Natural Logarithm With a Calculator
 - Natural Selection and the Owl Butterfly
 - Navigation Word Problem
 - Negative and Positive Exponents
 - Negative Exponent Intuition
 - Negative Externalities
 - Negative Numbers Introduction
 - Negative Numbers on the Number Line
 - Negative Signs in Numerators and Denominators
 - Negative Symbol as Opposite
 - Nets of Polyhedra
 - Neuronal Synapses (Chemical)
 - New Operator Definitions
 - Newton’s First Law of Motion
 - Newton’s Second Law of Motion
 - Newton’s Third Law of Motion
 - Nicolas Poussin, Landscape with St. John and Rape of the Sabines
 - Nike Adjusting Her Sandal
 - Non-Linear Systems of Equations 1
 - Non-Linear Systems of Equations 2
 - Non-Linear Systems of Equations 3
 - Nonprofit Founder & Writer: What I Do and Where I’m Going
 - Nonprofit Program Director: How I Got My Job and Where I’m Going
 - Nonprofit Program Director: My Budget and Planning for the Future
 - Nonprofit Program Director: Paying for College Without Debt
 - Nonprofit Program Director: What I Do and How Much I Make
 - Normal and Inferior Goods
 - Normal Colon Tissue
 - Normal Force and Contact Force
 - Normal Force in an Elevator
 - Null and Alternative Hypotheses
 - Number Base Conversion Practice
 - Number Line Addition and Subtraction
 - Number Lines for Addition and Subtraction
 - Number of Solutions to a Linear Equation (Example 1)
 - Number of Solutions to a Linear Equation (Example 2)
 - Number of Solutions to a Linear Equation (Example 3)
 - Number Opposites
 - Number Patterns: Interpreting and Graphing Relationships
 - Number Patterns: Interpreting Relationships
 - Number Patterns: Seeing Relationships
 - Number Patterns: Visualizing Sequence Relationships
 - Number Sets
 - Number Sets 1
 - Number Sets 2
 - Number Sets 3
 - Numerator and Denominator of a Fraction
 - Object Image and Focal Distance Relationship (Proof of Formula)
 - Object Image Height and Distance Relationship
 - Officer on Horseback
 - Oil Paint in Venice
 - Oligopolies and Monopolistic Competition
 - Oligopolies, Duopolies, Collusion and Cartels
 - One-Step Equation Involving Fractions
 - One-Step Inequalities
 - One-Step Inequalities 2
 - Open Market Operations and Quantitative Easing Overview
 - Open-End Mutual Fund Redemptions
 - Open-Ended Mutual Fund (Part 1)
 - Open-Ended Mutual Funds
 - Opportunity Cost
 - Opposite of a Given Number
 - Opposite of a Number
 - Opposite of a Polynomial
 - Optimal Angle for Projectile Part 1
 - Optimal Angle for Projectile Part 2- Hangtime
 - Optimal Angle for Projectile Part 3- Horizontal Distance as a Function of Angle (and Speed)
 - Optimal Angle for Projectile Part 4- Finding the Optimal Angle and Distance with a bit of Calculus
 - Optimal Point on Budget Line
 - Option Expiration and Price
 - Optional Calculus Proof to Show that MR has Twice Slopes of Demand
 - Options for Tracking and Managing Your Spending
 - Orbitals
 - Order of Operations
 - Order of Operations 1
 - Order of Operations 2
 - Order of Operations 2 (Old)
 - Order of Operations with Exponents
 - Ordered Pair Solutions of Equations
 - Ordering Difference of Variables on a Number Line
 - Ordering Fractions
 - Ordering Fractions
 - Ordering Lines by Length
 - Ordering Negative Numbers
 - Ordering Numeric Expressions
 - Ordering Positive and Negative Rational Numbers
 - Ordering Triangle Sides and Angles
 - Origins of Algebra
 - Other Periodic Table Trends
 - Other Triangle Congruence Postulates
 - Otto Dix, Portrait of Sylvia von Harden
 - Outdoor Education Professional: Becoming an Outdoor Educator
 - Outdoor Education Professional: How I Got My Job and Where I’m Going
 - Outdoor Education Professional: My Budget and Planning for the Future
 - Outdoor Education Professional: What I Do and How Much I Make
 - Outdoor Education Professional: Working as an Outdoor Educator
 - Overtaking Word Problem
 - Overview of FAFSA and CSS PROFILE
 - Overview of Fractional Reserve Banking
 - Overview of the ACT
 - Overview of the SAT
 - Overview: Applying to College
 - Overview: Exploring College Options
 - Overview: Making High School Count
 - Overview: Paying for College
 - Oxidation and Reduction in Cellular Respiration
 - Oxidation and Reduction Review from Biological Point of View
 - Oxidative Phosphorylation and Chemiosmosis
 - Ozone Layer and Eukaryotes Show Up in the Proterozoic Eon
 - P/E Conundrum
 - P/E Discussion
 - Pablo Picasso, Les Demoiselles d’Avignon
 - Pablo Picasso, Still-Life with Chair Caning
 - Palace and Grave, Mycenae
 - Pangaea
 - Pantheon, The
 - Parabola Focus and Directrix 1
 - Parabolic Mirrors 2
 - Parabolic Mirrors and Real Images
 - Parallax in Observing Stars
 - Parallel Line Equation
 - Parallel Lines
 - Parallel Lines 2
 - Parallel lines 3
 - Parallelogram on the Coordinate Plane
 - Parametric Equations 1
 - Parametric Equations 2
 - Parametric Equations 3
 - Parametric Equations 4
 - Parsec Definition
 - Parsing Gross Domestic Product
 - Part 1 of Proof of Heron’s Formula
 - Part 2 of the Proof of Heron’s Formula
 - Partial Fraction Expansion 1
 - Partial Fraction Expansion 2
 - Partial Fraction Expansion 3
 - Partial Pressure
 - Partial Quotient Division
 - Partial Quotient Method of Division 2
 - Parts of a Cell
 - Parts of a Circle
 - Passed Bike Word Problem
 - Passing Trains
 - Pattern of US Cold War Interventions
 - Patterns in Multiplication Tables
 - Patterns in Raising 1 and -1 to Different Powers
 - Patterns in Sequences 1
 - Patterns in Sequences 2
 - Paul Cezanne, Bathers (Les Grandes Baigneuses)
 - Paul Cezanne, Still Life with Apples
 - Paul Cezanne, The Large Bathers
 - Paul Cezanne, The Red Rock
 - Paul Gauguin, The Red Cow
 - Paul Gauguin, Vision After the Sermon, or Jacob Wrestling with the Angel
 - Paul Klee, Twittering Machine
 - Paul Troost, House of (German) Art
 - Payday Loans
 - Paying Back Your Loans
 - Paying Doctors
 - Pearson’s Chi-Square Test for Goodness of Fit
 - Pegging the Yuan
 - Percent and Decimals
 - Percent Word Problem: Penguins at the Zoo
 - Percent Word Problem: Recycled Cans
 - Percentage of a Whole Number
 - Percentage Tax on Hamburgers
 - Perfect Competition
 - Perfect Inelasticity and Perfect Elasticity of Demand
 - Performing Arithmetic Calculations on Units of Volume
 - Perimeter and Area Basics
 - Perimeter and Area of a Non-Standard Polygon
 - Perimeter and Unit Conversion
 - Perimeter of a Polygon
 - Perimeter of a Shape
 - Perimeter Word Problem: Skating Rink
 - Perimeter Word Problem: Tables
 - Periodic Table Trends: Ionization Energy
 - Permutations
 - Permutations and Combinations 1
 - Permutations and Combinations 2
 - Permutations and Combinations 3
 - Permutations and Combinations 4
 - Perpendicular Line Slope
 - Perpendicular Lines
 - Perpendicular lines 2
 - Perpendicular Radius Bisects Chord
 - Personal Bankruptcy:  Chapters 7 and 13
 - Peter Paul Rubens, Arrival (or Disembarkation) of Marie de Medici at Marseilles
 - Peter Paul Rubens, Elevation of the Cross
 - Peter Paul Rubens, The Consequences of War
 - Peter Paul Rubens, The Presentation of the Portrait of Marie de Medici
 - pH of a Weak Acid
 - pH of a Weak Base
 - pH, pOH of Strong Acids and Bases
 - Phase Diagrams
 - Phases of Meiosis
 - Phases of Mitosis
 - Phillips Curve
 - Photorespiration
 - Photosynthesis
 - Photosynthesis: Calvin Cycle
 - Photosynthesis: Light Reactions 1
 - Photosynthesis: Light Reactions and Photophosphorylation
 - Physical Therapist: How I Got My Job and Where I’m Going
 - Physical Therapist: How I Paid for College and Physical Therapy School
 - Physical Therapist: My Budget and Planning for the Future
 - Physical Therapist: What I Do and How Much I Make
 - Picture Graphs
 - Pierre-Auguste Renoir, La Loge
 - Pierre-Auguste Renoir, Moulin de la Galette
 - Pierre-Auguste Renoir, The Great Boulevards
 - Pierre-Auguste Renoir, The Large Bathers
 - Piet Mondrian, Composition No. II, with Red and Blue
 - Pieter Bruegel the Elder, Hunters in the Snow (Winter)
 - Pieter Bruegel the Elder, Peasant Wedding
 - Pieter Bruegel the Elder, The Tower of Babel
 - Pietro Cavallini, The Last Judgement
 - pKa and pKb Relationship
 - Place Value 1
 - Place Value 2
 - Place Value 3
 - Place Value Blocks
 - Place Value Example with 25
 - Place Value Example with 42
 - Place Value for Decimals Greater than One
 - Place Value when Multiplying and Dividing by 10
 - Place Value: Monkeys for a Party
 - Placing Positive and Negative Decimals on a Number Line
 - Plate Tectonics- Difference Between Crust and Lithosphere
 - Plate Tectonics- Evidence of Plate Movement
 - Plate Tectonics- Geological Features of Convergent Plate Boundaries
 - Plates Moving Due to Convection in Mantle
 - Plot Ordered Pairs
 - Plotting (x, y) Relationships
 - Plotting Decimals on a Number Line
 - Plotting Projectile Displacement, Acceleration, and Velocity
 - Point Line Distance and Angle Bisectors
 - Point-slope and standard form
 - Points on a Number Line
 - Poisson Process 1
 - Poisson Process 2
 - Polar Coordinates 1
 - Polar Coordinates 2
 - Polar Coordinates 3
 - Police Officer: How I Got My Job and Where I’m Going
 - Police Officer: My Budget and Planning for the Future
 - Police Officer: What I Do and How Much I Make
 - Polyalphabetic Cipher
 - Polynomial Divided by Monomial
 - Polynomials 2
 - Polynomials1
 - Ponzi Schemes
 - Population Health Director: How I Got My Job and Where I’m Going
 - Population Health Director: Learning from Every Job
 - Population Health Director: My Budget and Planning for the Future
 - Population Health Director: What I Do and How Much I Make
 - Positive Externalities
 - Potassium-Argon (K-Ar) Dating
 - Potential Energy Stored in a Spring
 - Powers of 10: Patterns
 - Powers of Fractions
 - Powers of Zero
 - Precession Causing Perihelion to Happen Later
 - Precocious Puberty
 - Present Value 2
 - Present Value 3
 - Present Value 4 (and Discounted Cash Flow)
 - Price and Market Capitalization
 - Price Behavior After Announced Acquisition
 - Price Elasticity of Demand
 - Price of Related Products and Demand
 - Primaries and Caucuses
 - Prime Factorization
 - Prime Numbers
 - Prisoners’ Dilemma and Nash Equilibrium
 - Probability (part 2)
 - Probability (part 3)
 - Probability (part 4)
 - Probability (part 5)
 - Probability (part 6)
 - Probability (part 7)
 - Probability (part 8)
 - Probability 1 Module Examples
 - Probability and Combinations (part 2)
 - Probability Density Functions
 - Probability from Compound Sample Space
 - Probability of Dependent Events
 - Probability of Dependent Events  2
 - Probability of More Complex outcome
 - Probability using Combinations
 - Probability with Playing Cards and Venn Diagrams
 - Problem involving angle derived from square and circle
 - Producer Surplus
 - Product Design Consultant: How I Got My Job and Where I’m Going
 - Product Design Consultant: My Budget and Planning for the Future
 - Product Design Consultant: What I Do and How Much I Make
 - Product of Functions
 - Production Possibilities Frontier
 - Products and Exponents Raised to an Exponent Properties
 - Professional Antigen Presenting Cells (APC) and MHC II complexes
 - Projectile at an Angle
 - Projectile Height Given Time
 - Projectile Motion with Ordered Set Notation
 - Projectile on an Incline
 - Proof (Advanced) Field from Infinite Plate (Part 1)
 - Proof (Advanced) Field from Infinite Plate (Part 2)
 - Proof - Corresponding Angle Equivalence Implies Parallel Lines
 - Proof - Diagonals of a Parallelogram Bisect Each Other
 - Proof - Opposite Angles of Parallelogram Congruent
 - Proof - Opposite Sides of Parallelogram Congruent
 - Proof - Rhombus Area Half Product of Diagonal Length
 - Proof - Rhombus Diagonals are Perpendicular Bisectors
 - Proof - Sum of Measures of Angles in a Triangle are 180
 - Proof - Triangle Altitudes are Concurrent (Orthocenter)
 - Proof by Induction
 - Proof-Vertical Angles are Equal
 - Proof: A(log B) = log (B^A), log A - log B = log (A/B)
 - Proof: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)
 - Proof: Hyperbola Foci
 - Proof: Law of Sines
 - Proof: lim (sin x)/x
 - Proof: log a + log b = log ab
 - Proof: S (or Entropy) is a Valid State Variable
 - Proof: sin(a+b) = (cos a)(sin b) + (sin a)(cos b)
 - Proof: U=(3/2)PV or U=(3/2)nRT
 - Proof: Volume Ratios in a Carnot Cycle
 - Proper and Improper Fractions
 - Properties and Patterns for Multiplication
 - Properties of Multiplication
 - Properties of Whole Numbers
 - Proportionality Between Side Length and Perimeter
 - Proportionality Constant for Direct Variation
 - Proportionality Word Problem: Bananas
 - Proportionality Word Problem: Hot Dogs
 - Proportionality Word Problem: Movie Ticket and Popcorn
 - Proving that the Centroid is 2-3rds along the Median
 - Punnett Square Fun
 - Pure Numbers and Significant Digits
 - Purpose and Change Coach: How I Got My Job and Where I’m Going
 - Purpose and Change Coach: My Budget and Planning for the Future
 - Purpose and Change Coach: Navigating Career Change
 - Purpose and Change Coach: What I Do and How Much I Make
 - Put as Insurance
 - Put Payoff Diagram
 - Put vs. Short and Leverage
 - Put Writer Payoff Diagrams
 - Put-Call Parity
 - Put-Call Parity Arbitrage I
 - Put-Call Parity Arbitrage II
 - Put-Call Parity Clarification
 - PV-diagrams and Expansion Work
 - Pythagorean Theorem 1
 - Pythagorean Theorem 2
 - Pythagorean Theorem 3
 - Pythagorean Theorem Application
 - Pythagorean Theorem II
 - Pythagorean Theorem Proof Using Similarity
 - Quadrants of Coordinate Plane
 - Quadratic Equation part 2
 - Quadratic Equations in Standard Form
 - Quadratic Formula (proof)
 - Quadratic Formula 1
 - Quadratic Formula 2
 - Quadratic Formula 3
 - Quadratic Functions 1
 - Quadratic Functions 2
 - Quadratic Functions 3
 - Quadratic Inequalities
 - Quadratic Inequalities (Visual Explanation)
 - Quadrilateral Overview
 - Quadrilateral Properties
 - Quadrilaterals: Classifying Shapes
 - Quadrilaterals: Find the Type
 - Quadrilaterals: Kites as a Geometric Shape
 - Quantitative Easing
 - Quarrying and Carving Marble
 - Quasar Correction
 - Quasars
 - Quasistatic and Reversible Processes
 - Quotient of Functions
 - Race Cars with Constant Speed Around Curve
 - Rachel Ruysch, Fruit and Insects
 - Radians and Degrees
 - Radical Equation Application Problem
 - Radical Equivalent to Rational Exponents
 - Radical Equivalent to Rational Exponents 2
 - Radius of Observable Universe
 - Radius of Observable Universe (Correction)
 - Raising a Number to the 0 and 1st Power
 - Raising Money for a Startup
 - Ramesses II, Egypt
 - Random Predictions for 2060
 - Range and Mid-Range
 - Raphael, Alba Madonna
 - Raphael, Galatea
 - Raphael, Portrait of Pope Julius II
 - Raphael, The School of Athens and the Disputa
 - Rate Problem Involving Rational Equations
 - Rate Problem Using Fractions
 - Ratio problem with basic algebra (new HD)
 - Ratio Word Problem: Centimeters to Kilometers
 - Rational Equations
 - Rational Exponents and Exponent Laws
 - Rational Inequalities
 - Rational Inequalities 2
 - Rational Number Word Problem with a Fraction and Percent
 - Rational Number Word Problem with Proportions
 - Rational Number Word Problem with Ratios
 - Rational Number Word Problem: Decimals
 - Rational Number Word Problem: Fractions and Units of Time
 - Rational Number Word Problem: Money
 - Rationalizing Denominators of Expressions
 - Rationalizing Denominators With Conjugates
 - Ratios as Fractions
 - Ratios as Fractions in Simplest Form
 - Raymond Duchamp-Villon, Horse
 - Reactions in Equilibrium
 - Reading a Bar Graph
 - Reading Bar Charts
 - Reading Bar Graphs
 - Reading Box-and-Whisker Plots
 - Reading line Graphs
 - Reading Pictographs
 - Reading Pie Graphs (Circle Graphs)
 - Real and Nominal Return
 - Real GDP and Nominal GDP
 - Real GDP Driving Price
 - Rearrange Formulas to Isolate Specific Variables
 - Reasonable Samples
 - Receiving an Admissions Decision: Admit, Deny or Waitlist
 - Reciprocal of a Mixed Number
 - Recognizing Angles
 - Recognizing Direct and Inverse Variation
 - Recognizing Divisibility
 - Recognizing Fractions Greater than 1
 - Recognizing Functions (Example 1)
 - Recognizing Functions (Example 2)
 - Recognizing Functions (Example 3)
 - Recognizing Functions (Example 4)
 - Recognizing Linear Functions
 - Recognizing Odd and Even Functions
 - Recognizing Prime Numbers
 - Recognizing Rational and Irrational Numbers
 - Recognizing Shapes
 - Recognizing the Greater Number
 - Reconciling Thermodynamic and State Definitions of Entropy
 - Rectangle Area as Product of Dimensions
 - Red Blood Cells
 - Red Shift
 - Redox Reactions
 - Reflection on the Coordinate Plane
 - Refraction and Snell’s Law
 - Refraction in Water
 - Refraction of Seismic Waves
 - Registered Nurse and Construction Business Owner: Our Budget and Planning for Our Future
 - Registered Nurse: How I Got My Job and Where I’m Going
 - Registered Nurse: What I Do and How Much I Make
 - Regrouping Numbers into Various Place Values
 - Regrouping When Adding a Two-Digit and a One-Digit Number
 - Regrouping When Subtracting a One-Digit Number from a Two-Digit Number
 - Regrouping Whole Number Place Values
 - Regrouping Whole Numbers (Example 1)
 - Regrouping Whole Numbers (Example 2)
 - Regrouping Whole Numbers (Example 3)
 - Relating Addition and Subtraction
 - Relating Multiplication to Division
 - Relation Between Nominal and Real Returns and Inflation
 - Relations and Functions
 - Relationship Between Angular Velocity and Speed
 - Relationship Between Bond Prices and Interest Rates
 - Relief from the Arch of Titus
 - Rembrandt, Self-Portraits
 - Rembrandt, The Anatomy Lesson of Dr. Tulp
 - Rembrandt, The Night Watch
 - Rene Magritte, The Treachery of Images (Ceci N’est Pas une Pipe)
 - Rent Control and Deadweight Loss
 - Renting vs. Buying (Detailed Analysis)
 - Renting vs. Buying a Home
 - Renting vs. Buying a Home (Part 2)
 - Repeated Addition Word Problem
 - Representation & Abstraction: Looking at Millais and Newman
 - Representing a Number as a Decimal, Percent, and Fraction
 - Representing a Number as a Decimal, Percent, and Fraction 2
 - Representing and Comparing Rates
 - Representing Functions as Graphs
 - Repurchase Agreements (Repo Transactions)
 - Requesting Letters of Recommendation
 - Rethinking Three-Digit Addition for Mental Calculation
 - Return on Capital
 - Review of B cells, CD4 + T cells and CD8+ T cells
 - Review of China US Currency Situation
 - Review of Revenue and Cost Graphs for a Monopoly
 - Review of Triangle Properties
 - Rewriting a Fraction as a Decimal (Example 1)
 - Rewriting a Fraction as a Decimal (Example 2)
 - Rewriting a Fraction as a Decimal to the Hundredths Place
 - Rewriting Fractions as Decimals
 - Rhombus Diagonals
 - Richard Redgrave, The Sempstress
 - Right Triangles Inscribed in Circles (Proof)
 - Risk and Reward Introduction
 - Risks of Keynesian Thinking
 - Ritual of the Bedside Exam
 - ROA Discussion 1
 - ROA Discussion 2
 - Robert Motherwell, Elegy to the Spanish Republic No. 57
 - Robert Rauschenberg, Bed
 - Robert Smithson, Spiral Jetty
 - Rogier van der Weyden, The Last Judgment
 - Role of Phagocytes in Innate or Nonspecific Immunity
 - Role of the Sarcoplasmic Reticulum in Muscle Cells
 - Rosa Bonheur, Plowing in the Nivernais
 - Rosa Bonheur, Sheep in the Highlands
 - Rosetta Stone
 - Rotation on the Coordinate Plane
 - Roth IRAs
 - Rounding Decimals
 - Rounding to Estimate Differences
 - Rounding to Estimate Sums
 - Rounding to Estimate Sums 2
 - Rounding to the Nearest 10
 - Rounding to the Nearest 10 and 100
 - Rounding to the Nearest 100
 - Rounding Whole Numbers 1
 - Rounding Whole Numbers 2
 - Rounding Whole Numbers 3
 - Rounding Whole Numbers: Missing Digit
 - Roy Lichtenstein, Rouen Cathedral Set V
 - Saint Mark’s Basilica, Venice
 - Saint Peter’s Basilica, Vatican City
 - Sal Khan’s Story: Applying to College
 - Sal Khan’s Story: College Admissions
 - Sal Khan’s Story: Exploring College Options
 - Sal Khan’s Story: Making High School Count
 - Sal Khan’s Story: Paying for College
 - Sal Khan’s Story: Wrapping Up
 - Salon Owner: How I Got My Job and Where I’m Going
 - Salon Owner: My Budget and Planning for the Future
 - Salon Owner: Starting and Owning a Salon Business
 - Salon Owner: What I Do and How Much I Make
 - Salvador Dali, Metamorphosis of Narcissus
 - Salvador Dali, The Persistence of Memory
 - Sample Essay 1 with Admissions Feedback
 - Sample Essay 2 with Admissions Feedback
 - Sampling Distribution of a Sample Proportion
 - Sampling Distribution of the Difference Between Sample Means
 - Sandro Botticelli, La Primavera (Allegory of Spring)
 - Sandro Botticelli, The Birth of Venus
 - SAT Math: Angles, Arc Lengths and Trig Functions (Basic Example)
 - SAT Math: Angles, Arc Lengths and Trig Functions (Harder Example)
 - SAT Math: Center, Spread and Shape of Distributions
 - SAT Math: Circle Equations (Basic Example)
 - SAT Math: Circle Equations (Harder Example)
 - SAT Math: Circle Theorems (Basic Example)
 - SAT Math: Circle Theorems (Harder Example)
 - SAT Math: Complex Numbers (Basic Example)
 - SAT Math: Complex Numbers (Harder Example)
 - SAT Math: Congruence and Similarity (Basic Example)
 - SAT Math: Congruence and Similarity (Harder Example)
 - SAT Math: Data Collection and Conclusions (Basic Example)
 - SAT Math: Data Collection and Conclusions (Harder Example)
 - SAT Math: Data Inferences (Basic Example)
 - SAT Math: Data Inferences (Harder Example)
 - SAT Math: Function Notation (Basic Example)
 - SAT Math: Function Notation (Harder Example)
 - SAT Math: Graphing Linear Equations (Basic Example)
 - SAT Math: Graphing Linear Equations (Harder Example)
 - SAT Math: Interpreting Linear Functions (Basic Example)
 - SAT Math: Interpreting Linear Functions (Harder Example)
 - SAT Math: Interpreting Nonlinear Expressions (Basic Example)
 - SAT Math: Interpreting Nonlinear Expressions (Harder Example)
 - SAT Math: Isolating Quantities (Basic Example)
 - SAT Math: Isolating Quantities (Harder Example)
 - SAT Math: Key Features of Graphs (Basic Example)
 - SAT Math: Key Features of Graphs (Harder Example)
 - SAT Math: Linear and Exponential Growth (Basic Example)
 - SAT Math: Linear and Exponential Growth (Harder Example)
 - SAT Math: Linear and Quadratic Systems (Basic Example)
 - SAT Math: Linear and Quadratic Systems (Harder Example)
 - SAT Math: Linear Equation Word Problems
 - SAT Math: Linear Function Word Problems (Basic Example)
 - SAT Math: Linear Function Word Problems (Harder Example)
 - SAT Math: Linear Inequality Word Problems (Basic Example)
 - SAT Math: Linear Inequality Word Problems (Harder Example)
 - SAT Math: Manipulating Quadratic and Exponential Expressions (Basic Example)
 - SAT Math: Manipulating Quadratic and Exponential Expressions (Harder Example)
 - SAT Math: Nonlinear Equation Graphs (Basic Example)
 - SAT Math: Nonlinear Equation Graphs (Harder Example)
 - SAT Math: Operations with Polynomials (Basic Example)
 - SAT Math: Operations with Polynomials (Harder Example)
 - SAT Math: Operations with Rational Expressions
 - SAT Math: Percents (Basic Example)
 - SAT Math: Percents (Harder Example)
 - SAT Math: Polynomial Factors and Graphs (Basic Example)
 - SAT Math: Polynomial Factors and Graphs (Harder Example)
 - SAT Math: Quadratic and Exponential Word Problems (Basic Example)
 - SAT Math: Quadratic and Exponential Word Problems (Harder Example)
 - SAT Math: Radical and Rational Equations (Basic Example)
 - SAT Math: Radical and Rational Equations (Harder Example)
 - SAT Math: Radicals and Rational Exponents (Basic Example)
 - SAT Math: Radicals and Rational Exponents (Harder Example)
 - SAT Math: Ratios, Rates and Proportions (Basic Example)
 - SAT Math: Ratios, Rates and Proportions (Harder Example)
 - SAT Math: Right Triangle Geometry (Basic Example)
 - SAT Math: Right Triangle Geometry (Harder Example)
 - SAT Math: Right Triangle Word Problems (Basic Example)
 - SAT Math: Right Triangle Word Problems (Harder Example)
 - SAT Math: Scatter Plots (Basic Example)
 - SAT Math: Scatter Plots (Harder Example)
 - SAT Math: Solving Linear Equations and Linear Inequalities (Basic Example)
 - SAT Math: Solving Linear Equations and Linear Inequalities (Harder Example)
 - SAT Math: Solving Quadratic Equations (Basic Example)
 - SAT Math: Solving Quadratic Equations (Harder Example)
 - SAT Math: Solving Systems of Linear Equations (Basic Example)
 - SAT Math: Solving Systems of Linear Equations (Harder Example)
 - SAT Math: Structure in Expressions (Basic Example)
 - SAT Math: Structure in Expressions (Harder Example)
 - SAT Math: Systems of Linear Equations Word Problems
 - SAT Math: Systems of Linear Inequalities Word Problems (Basic Example)
 - SAT Math: Systems of Linear Inequalities Word Problems (Harder Example)
 - SAT Math: Table Data (Basic Example)
 - SAT Math: Table Data (Harder Example)
 - SAT Math: Units (Basic Example)
 - SAT Math: Units (Harder Example)
 - SAT Math: Volume Word Problems (Basic Example)
 - SAT Math: Volume Word Problems (Harder Example)
 - SAT Reading: History and Social Studies - How-To Part 1
 - SAT Reading: History and Social Studies - How-To Part 2
 - SAT Reading: Literature - How-To Part 1
 - SAT Reading: Literature - How-To Part 2
 - SAT Reading: Science - How-To Part 1
 - SAT Reading: Science - How-To Part 2
 - SAT Reading: Social Science - How-To Part 1
 - SAT Reading: Social Science - How-To Part 2
 - SAT Writing: Argumentative - How-To Example
 - SAT Writing: Informative - How-To Example
 - SAT Writing: Narrative - How-To Example
 - Scale Drawing Word Problem: Blueprint
 - Scale Factors and Area
 - Scale of Distance to Closest Stars
 - Scale of Earth and Sun
 - Scale of Solar System
 - Scale of the Galaxy
 - Scale of the Large
 - Scale of the Small
 - Scaling Down a Triangle by Half
 - Scatter Plot Word Problem: American Smoking Trends
 - School Social Worker: How I Got My Job and Where I’m Going
 - School Social Worker: My Budget and Planning for the Future
 - School Social Worker: What I Do and How Much I Make
 - Scientific Notation (Old)
 - Scientific notation 1
 - Scientific notation 2
 - Scientific notation 3
 - Scientific Notation 3 (New)
 - Scientific Notation Example 2
 - Scientific Notation Examples
 - Scientific Notation I
 - Scientific Notation Word Problem: Red Blood Cells
 - Searching for Scholarships
 - Seasons Aren’t Dictated By Closeness to Sun
 - Secondary Active Transport in the Nephron
 - Seeing Multiplication as Scaling with Fractions
 - Seismic Waves
 - Selecting Your College
 - Senior Product Manager and Senior Software Engineer: Our Budget and Planning for Our Future
 - Senior Product Manager: How I Got My Job and Where I’m Going
 - Senior Product Manager: What I Do and How Much I Make
 - Senior Software Engineer: How I Got My Job and Where I’m Going
 - Senior Software Engineer: What I Do and How Much I Make
 - Sequences and Series (part 1)
 - Sequences and series (part 2)
 - Series Sum Example
 - Severe Contango Generally Bearish
 - Sex-Linked Traits
 - Shifts In Aggregate Demand
 - Short Run Aggregate Supply
 - Short-Run Oil Prices
 - Shorting Stock
 - Shorting Stock 2
 - Sienese Art: Duccio, Simone Martini and Ambrogio Lorenzetti
 - Significant Figures
 - Similar Triangle Basics
 - Similar Triangle Example Problems
 - Similar triangles
 - Similar triangles (part 2)
 - Similar Triangles Corresponding Sides and Angles
 - Similarity Example Problems
 - Similarity example where same side plays different roles
 - Similarity Postulates
 - Simple Analysis of Cost per Job Saved from Stimulus
 - Simple Equations
 - Simple Fractional Reserve Accounting (Part 2)
 - Simple Merger Arb with Share Acquisition
 - Simple Probability
 - Simple Quadratic Equation
 - Simplifying a Complicated Expression into Scientific Notation
 - Simplifying an Expression With Multiple Variables
 - Simplifying Cube Roots
 - Simplifying Expressions Involving Rational Numbers
 - Simplifying Expressions with Exponents
 - Simplifying Expressions with Exponents 2
 - Simplifying Expressions with Exponents 3
 - Simplifying First for Subtracting Rational Expressions
 - Simplifying Multivariable Polynomial
 - Simplifying Radical Expressions 1
 - Simplifying Radical Expressions 2
 - Simplifying Radical Expressions 3
 - Simplifying Radicals
 - Simplifying Rates and Ratios
 - Simplifying Rational Expressions 1
 - Simplifying Rational Expressions 2
 - Simplifying Rational Expressions 3
 - Simplifying Rational Expressions Example 2
 - Simplifying Square Roots
 - Simplifying Square Roots Comment Response
 - Simply a Polynomial
 - Site Reliability Engineer: How I Got My Job and Where I’m Going
 - Site Reliability Engineer: My Budget and Planning for the Future
 - Site Reliability Engineer: What I Do and How Much I Make
 - Skill of Describing, The
 - Skip Counting by 100
 - Skip Counting by 5
 - Slice a Rectangular Pyramid
 - Slope and Y-intercept Intuition
 - Slope Example
 - Slope of a line
 - Slope of a Line 2
 - Slope of a Line 3
 - Snell’s Law Examples 1
 - Snell’s Law Examples 2
 - Social Security Intro
 - Sodium Potassium Pump
 - Solid Geometry Volume
 - Solubility
 - Solving a Consecutive Integer Problem Algebraically
 - Solving a quadratic by factoring
 - Solving Addition and Subtraction Word Problems Using a Number Line
 - Solving and graphing linear inequalities in two variables 1
 - Solving Application Problems Involving Units of Volume
 - Solving Equations 1
 - Solving Equations 2
 - Solving Equations with the Distributive Property
 - Solving Equations with the Distributive Property 2
 - Solving Exponential Equations
 - Solving Factored Equations
 - Solving for a Variable
 - Solving for a Variable 2
 - Solving for an Angle
 - Solving for the Missing Fraction
 - Solving for Time
 - Solving Inequalities
 - Solving Logarithmic Equations
 - Solving Logarithmic Equations
 - Solving One-Step Equations
 - Solving One-Step Equations 2
 - Solving Percent Problems 2
 - Solving Percent Problems 3
 - Solving Problems with Bar Graphs
 - Solving Problems with Bar Graphs
 - Solving Problems with Pictographs
 - Solving Quadratic Equations by Factoring
 - Solving Quadratic Equations by Factoring 2
 - Solving Quadratic Equations by Factoring 3
 - Solving Quadratics by Factoring
 - Solving Radical Equations
 - Solving Radical Equations 1
 - Solving Radical Equations 2
 - Solving Radical Equations 3
 - Solving Rational Equations 1
 - Solving Rational Equations 2
 - Solving Rational Equations 3
 - Solving systems by elimination
 - Solving systems by elimination 2
 - Solving systems by elimination 3
 - Solving systems by graphing
 - Solving Systems by Graphing
 - Solving systems by graphing 2
 - Solving systems by graphing 3
 - Solving systems by substitution 1
 - Solving systems by substitution 2
 - Solving systems by substitution 3
 - Solving the Troll Riddle Visually
 - SOPA and PIPA
 - Sorting Absolute Values on the Number Line
 - Soultions to Three Variable System
 - Space Station Speed in Orbit
 - Special Polynomials Products 1
 - Special Products of Polynomials 1
 - Special Products of Polynomials 2
 - Special Products of Polynomials 3
 - Species
 - Specific Heat, Heat of Fusion and Vaporization
 - Spectrophotometry Example
 - Spectrophotometry Introduction
 - Specular and Diffuse Reflection
 - Specular and Diffuse Reflection 2
 - Speed Translation
 - Spring Potential Energy Example (Mistake in Math)
 - Square a Binomial
 - Square Root of a Decimal
 - Squeeze Theorem
 - SSS to Show a Radius is Perpendicular to a Chord that it Bisects
 - Stagflation
 - Standard of Ur
 - Star Field and Nebula Images
 - Start-Up CEO: Advice for Running a Start-Up
 - Start-Up CEO: How I Got My Job and Where I’m Going
 - Start-Up CEO: My Budget and Planning for the Future
 - Start-Up CEO: What I Do and How Much I Make
 - States of Matter
 - States of Matter Follow-Up
 - Static and Kinetic Friction Example
 - Statistical Questions
 - Statistical Significance of an Experiment (Simulation)
 - Stellar Distance Using Parallax
 - Stellar Parallax
 - Stellar Parallax Clarification
 - Stem-and-Leaf Plots
 - Stenosis, Ischemia and Heart Failure
 - Stock Dilution
 - Stoichiometry
 - Stoichiometry Example Problem 1
 - Stoichiometry Example Problem 2
 - Stoichiometry of a Reaction in Solution
 - Stoichiometry: Limiting Reagent
 - Strokes
 - Strong Acid Titration
 - Structure of the Earth
 - Student Story: Admissions Essay About a Formative Experience
 - Student Story: Admissions Essay About a Meaningful Poem
 - Student Story: Admissions Essay About a Past Mistake
 - Student Story: Admissions Essay About Community Impact
 - Student Story: Admissions Essay About Personal Identity
 - Student Story: Admissions Interview
 - Student Story: Applying for Scholarships
 - Student Story: College Brings New Friends, Learning and Freedom
 - Student Story: College Expands Opportunities
 - Student Story: College Increases Confidence
 - Student Story: College Offers Exposure to Diversity
 - Student Story: Extracurriculars that Are a Passion
 - Student Story: Extracurriculars that Are Leadership Opportunities
 - Student Story: Extracurriculars that Are Nontraditional
 - Student Story: Extracurriculars that Are Self Created
 - Student Story: Extracurriculars that Carry Over from High School to College
 - Student Story: High School Classes
 - Student Story: Overcoming Anxiety About Not Fitting In as an Obstacle to College
 - Student Story: Overcoming Cultural Obstacles to College
 - Student Story: Overcoming Family Obstacles to College
 - Student Story: Overcoming Financial Obstacles to College
 - Student Story: Overcoming Immigration Obstacles to College
 - Student Story: Overcoming Lack of High School Support as an Obstacle to College
 - Student Story: Overcoming Social Obstacles to College
 - Student Story: Overcoming the Financial Aid Process as an Obstacle to College
 - Student Story: Prioritizing Financial Aid in the College Search
 - Student Story: Prioritizing Financial Aid, Major and Location in the College Search
 - Student Story: Prioritizing Location in the College Search
 - Student Story: Prioritizing Size, Campus, Major and Selectivity in the College Search
 - Student Story: Prioritizing Size, Selectivity, Diversity and Financial Aid in the College Search
 - Student Story: Relying on Scholarships when Facing Immigration Challenges
 - Student Story: Searching for Scholarships
 - Student Story: Standardized Tests
 - Student Story: Work Study as a Study Hall
 - Student Story: Work Study as an Opportunity to Learn
 - Substitution Method
 - Substitution Method 2
 - Substitution Method 3
 - Substitution with Negative Numbers
 - Subtracting 1 vs. Subtracting 10
 - Subtracting 10 or 100
 - Subtracting 14 - 6
 - Subtracting and Simplifying Radicals
 - Subtracting Complex Numbers
 - Subtracting Decimals
 - Subtracting Decimals (Example 1)
 - Subtracting Decimals (Example 2)
 - Subtracting Decimals (Old)
 - Subtracting Decimals Word Problem
 - Subtracting Fractions
 - Subtracting Fractions (ex 1)
 - Subtracting Fractions with Common Denominators (ex 1)
 - Subtracting Fractions with Unlike Denominators
 - Subtracting Fractions with Unlike Denominators Word Problem
 - Subtracting Hundreds, Tens and Ones
 - Subtracting in Scientific Notation
 - Subtracting Mixed Numbers
 - Subtracting Mixed Numbers 2
 - Subtracting Mixed Numbers Introduction
 - Subtracting Mixed Numbers with Regrouping
 - Subtracting Mixed Numbers Word Problem
 - Subtracting Polynomials
 - Subtracting Polynomials With Multiple Variables
 - Subtracting Rational Expressions
 - Subtracting Real Numbers
 - Subtracting Three-Digit Numbers Without Regrouping
 - Subtracting Two-Digit Numbers Without Regrouping (Example 1)
 - Subtracting Two-Digit Numbers Without Regrouping (Example 2)
 - Subtracting Whole Numbers
 - Subtracting with Regrouping
 - Subtracting: Regrouping from Zero
 - Subtracting: Regrouping Twice
 - Subtracting: Three-Digit Numbers and Basic Regrouping
 - Subtracting: Three-Digit Numbers and Regrouping
 - Subtraction 2
 - Subtraction 3: Introduction to Borrowing or Regrouping
 - Subtraction With Borrowing or Regrouping
 - Subtraction Word Problem
 - Subtraction Word Problem Within 10
 - Succeeding at the College Admissions Interview
 - Sum and Product of Irrational Numbers
 - Sum and Product of Rational Numbers
 - Sum of Consecutive Odd Integers
 - Sum of Functions
 - Sum of Interior Angles of a Polygon
 - Sum of Logarithms With Same Base
 - Sum of the exterior angles of convex polygon
 - Supermassive Black Holes
 - Supernova (Supernovae)
 - Supernova Clarification
 - Surface Area of a Box
 - Surface Area of a Box Using a Net
 - Suspensions, Colloids, and Solutions
 - Sutton Hoo Ship Burial
 - System of Inequalities Application
 - Systemic Thinking About Cancer
 - Systems and rate problems
 - Systems and rate problems 2
 - Systems and rate problems 3
 - systems of equations
 - Systems of Three Variables
 - Systems of Three Variables 2
 - Taking percentages
 - Tau versus Pi
 - Tax Deductions Introduction
 - Tax Lever of Fiscal Policy
 - Taxation and Dead Weight Loss
 - Taxes and Perfectly Elastic Demand
 - Taxes and Perfectly Inelastic Demand
 - Taxes for Factoring in Negative Externalities
 - Taxonomy and the Tree of Life
 - Teacher Leader: How I Got My Job and Where I’m Going
 - Teacher Leader: My Budget and Planning for the Future
 - Teacher Leader: What I Do and How Much I Make
 - Teens as Sums with 10
 - Telling Time (Example 1)
 - Telling Time (Example 2)
 - Telling Time Problems with Number Lines
 - Telling Time to the Nearest Minute (Unlabeled Clock)
 - Tempera Paint
 - Temperature Change Word Problem
 - Temple of Portunus, Rome
 - Tension (Part 2)
 - Tension in an Accelerating System and Pie in the Face
 - Term and Whole Life
 - Term and Whole Life Insurance Policies
 - Term Life Insurance and Death Probability
 - Terms Coefficients and Exponents in a Polynomial
 - Testing a Solution for a System of Equations
 - Testing Congruence Through Transformations (Example 1)
 - Testing Congruence Through Transformations (Example 2)
 - Testing if a relationship is a function
 - Testing Similarity Through Transformations
 - Testing Solutions for a System of Inequalities
 - Testing Solutions to Linear Equations
 - Testing Whether Area Is Proportional to Side Length
 - The Angle Game
 - The Beauty of Algebra
 - The Business Cycle
 - The Discount Rate
 - The Dot Product
 - The Golden Ratio
 - The Housing Price Conundrum
 - The Kidney and Nephron
 - The Lungs and Pulmonary System
 - The Mohorovicic Seismic Discontinuity
 - The Mole and Avogadro’s Number
 - The Pythagorean Theorem
 - The Rule of 72 for Compound Interest
 - The unit circle definition of trigonometric function
 - The Yield Curve
 - The Zeroth Power
 - Theodore Gericault, Raft of the Medusa
 - Thermodynamic Entropy Definition Clarification
 - Thermodynamics (Part 1)
 - Thermodynamics (Part 2)
 - Thermodynamics (Part 3)
 - Thermodynamics (Part 4)
 - Thermodynamics (Part 5)
 - Thiago Asks: How Much Time Does a Goalkeeper Have to React to a Penalty Kick?
 - Thinking About Probability
 - Thinking About Shapes of Distributions
 - Thinking About the Changing Values of Variables and Expressions
 - Thinking About the Sign of Expressions
 - Thomas Cole, The Oxbow
 - Thomas Couture, Romans of the Decadence
 - Thomas Malthus and Population Growth
 - Three Equation Application Problem
 - Three Points Defining a Circle
 - Thrombo-emboli and Thromboembolisms
 - Thutmose, Bust of Nefertiti
 - Time Conversions
 - Time Differences (Elapsed Time)
 - Time Differences 1
 - Time Differences in Different Time Zones
 - Time Value of Money
 - Time Word Problem: Puzzle
 - Time Word Problem: Susan’s Break
 - Time Word Problem: When to Leave to Get Home on Time
 - Tintoretto, The Finding of the Body of Saint Mark
 - Tintoretto, The Miracle of the Slave
 - Titian, Bacchus and Ariadne
 - Titian, Madonna of the Pesaro Family
 - Titian, Pieta
 - Titration Roundup
 - Total Consumer Surplus as Area
 - Total Displacement for Projectile
 - Total Final Velocity for Projectile
 - Total Internal Reflection
 - Total Revenue and Elasticity
 - Tour of Hadrian’s Villa, A
 - Tour Through Ancient Rome in 320 C.E., A
 - Traditional IRAs
 - Tragedy of the Commons
 - Trajan’s Forum
 - Transformation Matrix for Position Vector
 - Transitioning from Counting to Multiplying to Find Area
 - Translating Numerical Expressions with Parentheses
 - Translation on the Coordinate Plane
 - Treasury Bond Prices and Yields
 - Triangle Angle Example 1
 - Triangle Angle Example 2
 - Triangle Angle Example 3
 - Triangle Area Proofs
 - Triangle Medians and Centroids
 - Triangle Medians and Centroids (2D Proof)
 - Trig identities part 2
 - Trig identities part 3
 - Trigonometric Identities
 - Trigonometric System Example
 - Trigonometry Identity Review/Fun
 - Trigonometry word problems (part 1)
 - Trigonometry word problems (part 2)
 - Troll, Tolls and Systems of Equations
 - Tropomyosin and Troponin and their Role in Regulating Muscle Contraction
 - Two column proof showing segments are perpendicular
 - Two Passing Bicycles Word Problem
 - Two-Way Frequency Tables and Venn Diagrams
 - Two-Way Relative Frequency Tables
 - Type I and Type II Errors in Hypothesis Testing
 - Type I Errors in Hypothesis Testing
 - Types of College Loans
 - Types of Decay
 - Types of Grants and Scholarships
 - Types of Immune Responses: Innate and Adaptive. Humoral vs. Cell-Mediated
 - Types of Indifference Curves
 - U.S. Customary and Metric Units
 - U.S. Customary Units: Distance
 - U.S. Customary Units: Fluid Volume
 - U.S. Customary Units: Weight
 - Umbo (Otto Umbehr), The Roving Reporter
 - Understanding Calendar Notation
 - Understanding Division of Fractions
 - Understanding Exponents
 - Understanding Exponents 2
 - Understanding Fractions as Division
 - Understanding Liquid Volume (Capacity)
 - Understanding Logical Statements 1
 - Understanding Logical Statements 2
 - Understanding Logical Statements 3
 - Understanding Logical Statements 4
 - Understanding Logical Statements Commentary
 - Understanding Mass
 - Understanding Place Value when Adding Ones
 - Understanding Place Value when Adding Tens
 - Understanding Place Value when Subtracting Ones
 - Understanding Place Value when Subtracting Tens
 - Understanding Proportions
 - Understanding Slope
 - Understanding Square Roots
 - Unemployment
 - Unemployment Rate Primer
 - Unemployment Rate Primer (v2)
 - Unicorn in Captivity, The
 - Unit Circle Definition of Trig Functions
 - Unit Conversion
 - Unit Conversion Example: Drug Dosage
 - Unit Conversion With Fractions
 - Unit Conversion: Centimeters to Meters
 - Unit Conversion: Minutes to Hours
 - Unit Conversion: Ordering Metric Distances
 - Unit Measurement Word Problem: Distance (U.S. Customary)
 - Unit Vector Notation
 - Unit Vector Notation (Part 2)
 - Unit Vectors and Engineering Notation
 - Units of Measurement Word Problem: Volume (Metric)
 - Unknowns with Multiplication and Division
 - Upper Bound on Forward Settlement Price
 - US and Japanese Quantitative Easing
 - US History Overiew 2: Reconstruction to the Great Depression
 - US History Overview 1: Jamestown to the Civil War
 - US History Overview 3: WWII to Vietnam
 - Usain Bolt’s Average Speed
 - Use Cases for Credit Default Swaps
 - User Experience Researcher: How I Got My Job and Where I’m Going
 - User Experience Researcher: My Budget and Planning for the Future
 - User Experience Researcher: What I Do and How Much I Make
 - Using a Confidence Interval to Test for a Difference Between Proportions
 - Using a Protractor
 - Using Algebra to Find Measures of Angles Formed by a Transversal
 - Using Factors and Multiples to Figure Out Days of the Week
 - Using Fractions as Division to Create Mixed Numbers
 - Using Multiple Logarithm Properties to Simplify
 - Using Multiples of 10 to Calculate Quotients
 - Using Reserves to Stabilize Currency
 - Using Similar Triangles to Prove that Slope Is Constant for a Line
 - Using the Pythagorean Theorem
 - Using Trig Functions
 - Using Trig Functions Part II
 - Valance Electrons
 - Van Der Waals Forces
 - Vapor Pressure
 - Vapor Pressure Example
 - Variables and Expressions 1
 - Variables Expressions and Equations
 - Variation in a Species
 - Vasily Kandinsky, Improvisation 28 (Second Version)
 - Velocity of Money Rather Than Quantity Driving Prices
 - Verifying Hedge with Futures Margin Mechanics
 - Veterinarian: How I Got My Job and Where I’m Going
 - Veterinarian: My Budget and Planning for the Future
 - Veterinarian: What I Do and How Much I Make
 - Vi and Sal Explore How We Think About Scale
 - Vi and Sal Talk About the Mysteries of Benford’s Law
 - Vice President of Wealth Management: How I Got My Job and Where I’m Going
 - Vice President of Wealth Management: My Budget and Planning for the Future
 - Vice President of Wealth Management: What I Do and How Much I Make
 - Vietnam War
 - Viewing g as the Value of Earth’s Gravitational Field Near the Surface
 - Vincent van Gogh, Portrait of Joseph Roulin
 - Vincent van Gogh, Self-Portrait Dedicated to Paul Gauguin
 - Vincent van Gogh, The Bedroom
 - Virtual Image
 - Viruses
 - Visiting Campus
 - Visual Understanding of Centripetal Acceleration Formula
 - Visualizing Average Costs and Marginal Costs as Slope
 - Visualizing Equivalent Fractions
 - Visualizing Fraction Multiplication
 - Visualizing Vectors in 2 Dimensions
 - Visually Adding Fractions with Unlike Denominators
 - Visually Converting from Tenths to Hundredths
 - Visually Subtracting Fractions with Unlike Denominators
 - Vitamin C and the Limeys
 - Voltage
 - Volume Conversions (U.S. Customary)
 - Volume of a Composite Shape
 - Volume of a Cone
 - Volume of a Rectangular Prism or Box
 - Volume of a Rectangular Prism: Fractional Cubes
 - Volume of a Rectangular Prism: Fractional Dimensions
 - Volume of a Rectangular Prism: Word Problem
 - Volume of a Sphere
 - Volume Word Problem: Water Tank
 - Volunteer Coordinator: Boundaries and Self-Care in a Direct Service Career
 - Volunteer Coordinator: How I Got My Job and Where I’m Going
 - Volunteer Coordinator: My Budget and Planning for the Future
 - Volunteer Coordinator: What I Do and How Much I Make
 - Wassily Kandinsky, Composition VII
 - Ways to Add Two-Digit Numbers
 - Ways to Represent Data
 - Weak Acid Titration
 - Weaknesses of Fractional Reserve Lending
 - Wealth Destruction 1
 - Wealth Destruction 2
 - Weight Conversions (U.S. Customary & Metric)
 - Welder: How I Got My Job and Where I’m Going
 - Welder: My Budget and Planning for the Future
 - Welder: What I Do and How Much I Make
 - What Are Terms, Factors and Coefficients in Algebraic Expressions?
 - What Causes Precession and Other Orbital Changes
 - What Is a Function?
 - What is Inflation
 - What It Means to Buy a Company’s Stock
 - When Capitalism is Great and Not-so-great
 - When the Source and the Wave Move at the Same Velocity
 - White and Black Dwarfs
 - Who Can Succeed in College?
 - Whole Numbers as Fractions
 - Why Borrowing Works
 - Why Cepheids Pulsate
 - Why Current and Capital Accounts Net Out
 - Why Distance is Area under Velocity-Time Line
 - Why Europe is Worried About Greece
 - Why Gravity Gets So Strong Near Dense Objects
 - Why Is that Important?: Looking at Jackson Pollock
 - Why Lattice Multiplication Works
 - Why Look at Art?
 - Why Parties to Cartels Cheat
 - Why S-Waves Only Travel in Solids
 - William Dyce, Pegwell Bay, Kent
 - William Hogarth, Marriage A-la-Mode
 - William Holman Hunt, Our English Coasts (Strayed Sheep)
 - William Holman Hunt, The Awakening Conscience
 - Winslow Homer, The Fog Warning (Halibut Fishing)
 - Winslow Homer, The Life Line
 - Woodcuts and Etchings
 - Work and Energy (Part 2)
 - Work Done by Isothermic Process
 - Work from Expansion
 - Work/Energy Problem with Friction
 - Working During College
 - Would a Brick or a Feather Fall Faster
 - Writing a Strong College Admissions Essay
 - Writing an Equation for a Proportional Relationship
 - Writing and using inequalities
 - Writing and using inequalities 2
 - Writing and using inequalities 3
 - Writing Proportions
 - X and Y intercepts
 - X and Y intercepts 2
 - Yacht Captain: How I Got My Job and Where I’m Going
 - Yacht Captain: My Budget and Planning for the Future
 - Yacht Captain: What I Do and How Much I Make
 
- Animation: Introduction to Animation
 - Animation: Introduction to Animation: Bezier Curves
 - Animation: Introduction to Animation: Getting to Know Rob Jensen
 - Animation: Introduction to Animation: Linear Interpolation
 - Animation: Introduction to Animation: Math Meets Artistry
 - Animation: Introduction to Animation: Squash and Stretch
 - Animation: Introduction to Animation: Straight-Ahead Animation
 - Animation: Mathematics of Animation Curves
 - Animation: Mathematics of Animation Curves: De Casteljau’s Algorithm
 - Animation: Mathematics of Animation Curves: Mathematics of Linear Interpolation
 - Animation: Mathematics of Animation Curves: Repeated Linear Interpolation
 - Animation: Mathematics of Animation Curves: What Degree Are These Curves?
 - Art of Storytelling, The: Character
 - Art of Storytelling, The: Character: Advice to Storytellers
 - Art of Storytelling, The: Character: Character Arc
 - Art of Storytelling, The: Character: Character Development
 - Art of Storytelling, The: Character: Internal vs. External Features
 - Art of Storytelling, The: Character: Obstacles
 - Art of Storytelling, The: Character: Stakes
 - Art of Storytelling, The: Character: Wants vs. Needs
 - Art of Storytelling, The: Film Grammar
 - Art of Storytelling, The: Film Grammar: Advice for Storytellers
 - Art of Storytelling, The: Film Grammar: Basic Shot Types
 - Art of Storytelling, The: Film Grammar: Dynamic Shots
 - Art of Storytelling, The: Film Grammar: Major & Minor Beats
 - Art of Storytelling, The: Film Grammar: Storyboarding
 - Art of Storytelling, The: Story Structure
 - Art of Storytelling, The: Story Structure: Act 1
 - Art of Storytelling, The: Story Structure: Act 2
 - Art of Storytelling, The: Story Structure: Act 3
 - Art of Storytelling, The: Story Structure: Advice to Storytellers
 - Art of Storytelling, The: Story Structure: Introduction to Structure
 - Art of Storytelling, The: Story Structure: Story Spine
 - Art of Storytelling, The: Story Structure: Theme
 - Art of Storytelling, The: Visual Language
 - Art of Storytelling, The: Visual Language: Advice for Storytellers
 - Art of Storytelling, The: Visual Language: Color
 - Art of Storytelling, The: Visual Language: Introduction to Visual Language
 - Art of Storytelling, The: Visual Language: Line
 - Art of Storytelling, The: Visual Language: Motion
 - Art of Storytelling, The: Visual Language: Shape
 - Art of Storytelling, The: Visual Language: Space
 - Art of Storytelling, The: Visual Language: Tone
 - Art of Storytelling, The: We Are All Storytellers
 - Art of Storytelling, The: We Are All Storytellers: Advice for Storytellers
 - Art of Storytelling, The: We Are All Storytellers: Introduction to Storytelling
 - Art of Storytelling, The: We Are All Storytellers: What If?
 - Art of Storytelling, The: We Are All Storytellers: World & Character
 - Art of Storytelling, The: We Are All Storytellers: Your Favorite Stories
 - Art of Storytelling, The: We Are All Storytellers: Your Unique Perspective
 - Character Modeling: Mathematics of Subdivision
 - Character Modeling: Mathematics of Subdivision: Fun with Weights
 - Character Modeling: Mathematics of Subdivision: Weighted Average of Three Points
 - Character Modeling: Mathematics of Subdivision: Weighted Subdivision
 - Character Modeling: Modeling with Subdivision Surfaces
 - Character Modeling: Modeling with Subdivision Surfaces: Getting to Know Alonso Martinez
 - Character Modeling: Modeling with Subdivision Surfaces: Split vs. Average
 - Character Modeling: Modeling with Subdivision Surfaces: Subdivide Operation
 - Character Modeling: Modeling with Subdivision Surfaces: Subdividing Your Own Designs
 - Character Modeling: Modeling with Subdivision Surfaces: Subdivision in 3D
 - Character Modeling: Modeling with Subdivision Surfaces: What Is Character Modeling?
 - Color Science: Color Spaces
 - Color Science: Color Spaces: CIE Chromaticity Diagram
 - Color Science: Color Spaces: Color Grading
 - Color Science: Color Spaces: HSL Color Space
 - Color Science: Color Spaces: Introduction to Color Space
 - Color Science: Color Spaces: Introduction to Gamuts
 - Color Science: Introduction to Color
 - Color Science: Introduction to Color: Color Contrast
 - Color Science: Introduction to Color: Color Correction
 - Color Science: Introduction to Color: Getting to Know Dominic Glynn
 - Color Science: Introduction to Color: HSL Color Model
 - Color Science: Introduction to Color: RGB Color Model
 - Color Science: Introduction to Color: Spectrum of Light
 - Color Science: Introduction to Color: What Is Color?
 - Crowds: Building Crowds
 - Crowds: Building Crowds: Casting Challenge
 - Crowds: Building Crowds: Counting with Tables
 - Crowds: Building Crowds: Counting with Trees
 - Crowds: Building Crowds: Getting to Know Fran Kalal
 - Crowds: Building Crowds: Introduction to Combinatorics
 - Crowds: Building Crowds: Robot Combinations
 - Crowds: Building Crowds: Tree Challenge
 - Crowds: Counting Crowds
 - Crowds: Counting Crowds: Binomial Coefficient
 - Crowds: Counting Crowds: Calculating Factorials
 - Crowds: Counting Crowds: Casting Problem
 - Crowds: Counting Crowds: Does Order Matter?
 - Crowds: Counting Crowds: Snake Bots
 - Crowds: Counting Crowds: Two-Headed Robots
 - Effects: Introduction to Particle Systems
 - Effects: Introduction to Particle Systems: Create Water Surface Using Particles
 - Effects: Introduction to Particle Systems: Effects Overview
 - Effects: Introduction to Particle Systems: Getting to Know Matt Wong
 - Effects: Introduction to Particle Systems: Simulating Water
 - Effects: Introduction to Particle Systems: Smooth Collisions
 - Effects: Introduction to Particle Systems: Understanding Particle Systems
 - Effects: Introduction to Particle Systems: What Else Can You Make with Particle Systems?
 - Effects: The Physics of Particle Systems
 - Effects: The Physics of Particle Systems: Animating Particles
 - Effects: The Physics of Particle Systems: Force and Acceleration
 - Effects: The Physics of Particle Systems: Graphing Motion over Time
 - Effects: The Physics of Particle Systems: Particle Collisions
 - Effects: The Physics of Particle Systems: Understanding Net Forces
 - Effects: The Physics of Particle Systems: Vector Addition
 - Environment Modeling: Calculating Parabolas
 - Environment Modeling: Calculating Parabolas: Completing the Proof
 - Environment Modeling: Calculating Parabolas: Compute the Touching Point
 - Environment Modeling: Calculating Parabolas: How Can We Prove This?
 - Environment Modeling: Calculating Parabolas: Weighted Average of Two Points
 - Environment Modeling: Calculating Parabolas: Where Is the Touching Point?
 - Environment Modeling: Modeling Grass with Parabolas
 - Environment Modeling: Modeling Grass with Parabolas: Animating Grass
 - Environment Modeling: Modeling Grass with Parabolas: Getting to Know Tony DeRose
 - Environment Modeling: Modeling Grass with Parabolas: Introduction to Subdivision Surfaces
 - Environment Modeling: Modeling Grass with Parabolas: Midpoint Formula
 - Environment Modeling: Modeling Grass with Parabolas: Modeling Grass
 - Environment Modeling: Modeling Grass with Parabolas: Parabolic Arcs
 - Environment Modeling: Modeling Grass with Parabolas: String Art
 - Overview of Pixar in a Box
 - Patterns: Geometry of Dinosaur Skin
 - Patterns: Geometry of Dinosaur Skin: Distributing Sites Randomly
 - Patterns: Geometry of Dinosaur Skin: Getting to Know Ana
 - Patterns: Geometry of Dinosaur Skin: Getting to Know Beth
 - Patterns: Geometry of Dinosaur Skin: Introduction to Patterns
 - Patterns: Geometry of Dinosaur Skin: Modeling Dino Skin
 - Patterns: Geometry of Dinosaur Skin: Voronoi Partition
 - Patterns: Geometry of Dinosaur Skin: What Are Shading Packets?
 - Patterns: Painting with Randomness
 - Patterns: Painting with Randomness: Looking at Different Resolutions
 - Patterns: Painting with Randomness: One-Dimensional Noise
 - Patterns: Painting with Randomness: Painting Your Dino Skin
 - Patterns: Painting with Randomness: Perlin Noise (1D)
 - Patterns: Painting with Randomness: Perlin Noise (2D)
 - Rendering: Mathematics of Rendering
 - Rendering: Mathematics of Rendering: 3D Ray Tracing (Part 1)
 - Rendering: Mathematics of Rendering: 3D Ray Tracing (Part 2)
 - Rendering: Mathematics of Rendering: Calculate Intersection Point
 - Rendering: Mathematics of Rendering: Parametric Form of a Ray
 - Rendering: Mathematics of Rendering: Ray Tracing Intuition
 - Rendering: Mathematics of Rendering: Using the Line Equation
 - Rendering: Rendering 101
 - Rendering: Rendering 101: Getting to Know Susan Fong
 - Rendering: Rendering 101: Introduction to Rendering
 - Rendering: Rendering 101: Light Rays
 - Rendering: Rendering 101: Light Reflection
 - Rendering: Rendering 101: Rendering Mike Wazowski
 - Rendering: Rendering 101: What Is Ray Tracing?
 - Rigging: Code a Character
 - Rigging: Code a Character: Creating Objects
 - Rigging: Code a Character: Functions
 - Rigging: Code a Character: Putting Shapes Together
 - Rigging: Introduction to Rigging
 - Rigging: Introduction to Rigging: Getting to Know Brian Green
 - Rigging: Introduction to Rigging: Make a Face
 - Rigging: Introduction to Rigging: Putting Everything Together
 - Rigging: Introduction to Rigging: Rotation Deformers
 - Rigging: Introduction to Rigging: Scale Deformers
 - Rigging: Introduction to Rigging: Translation Deformers
 - Rigging: Introduction to Rigging: Welcome to Rigging
 - Sets & Staging: Geometric Transformations
 - Sets & Staging: Geometric Transformations : Introduction to Geometric Transformations
 - Sets & Staging: Geometric Transformations: Commutativity
 - Sets & Staging: Geometric Transformations: Composite Transformations
 - Sets & Staging: Geometric Transformations: Coordinate Plane
 - Sets & Staging: Geometric Transformations: Rotation
 - Sets & Staging: Geometric Transformations: Scaling
 - Sets & Staging: Geometric Transformations: Translation
 - Sets & Staging: Mathematics of Rotation
 - Sets & Staging: Mathematics of Rotation: Completing the Proof
 - Sets & Staging: Mathematics of Rotation: Geometry of Rotation
 - Sets & Staging: Mathematics of Rotation: How Do We Rotate Points?
 - Simulation: Code Your Own Hair Simulation
 - Simulation: Code Your Own Hair Simulation: 1D Spring-Mass System
 - Simulation: Code Your Own Hair Simulation: 2D Spring-Mass System
 - Simulation: Code Your Own Hair Simulation: Multiple Spring-Mass System
 - Simulation: Code Your Own Hair Simulation: Starting with Particles
 - Simulation: Hair Simulation 101
 - Simulation: Hair Simulation 101: Adding Spring Stiffness and Damping
 - Simulation: Hair Simulation 101: Case Study - The Good Dinosaur
 - Simulation: Hair Simulation 101: Getting to Know Hayley Iben
 - Simulation: Hair Simulation 101: Modeling Hair
 - Simulation: Hair Simulation 101: Overview
 - Simulation: Hair Simulation 101: Support Springs
 - Simulation: Hair Simulation 101: Using a Spring-Mass System to Represent Hair
 - Virtual Cameras: How Virtual Cameras Work
 - Virtual Cameras: How Virtual Cameras Work: Camera Lenses
 - Virtual Cameras: How Virtual Cameras Work: Depth of Field
 - Virtual Cameras: How Virtual Cameras Work: Focal Distance
 - Virtual Cameras: How Virtual Cameras Work: Getting to Know Eben Ostby
 - Virtual Cameras: How Virtual Cameras Work: Introduction to Virtual Cameras
 - Virtual Cameras: How Virtual Cameras Work: Storytelling with the Camera
 - Virtual Cameras: How Virtual Cameras Work: What Is a Pinhole Camera?
 - Virtual Cameras: Mathematics of Depth of Field
 - Virtual Cameras: Mathematics of Depth of Field: Algebra of Focus
 - Virtual Cameras: Mathematics of Depth of Field: Mathematics of Pinhole Cameras
 - Virtual Cameras: Mathematics of Depth of Field: Out of Focus Objects
 - Virtual Cameras: Mathematics of Depth of Field: Simple Lens Law
 - Virtual Cameras: Mathematics of Depth of Field: Thin Lens Approximation