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Calculus  |  Precalculus  |  Trigonometry  |  Algebra  |  Finance  |  Pre-algebra  |  Arithmetic  |  Geometry  |  Physics  |  SAT Preparation  |  Probability  |  Linear Algebra  |  Differential Equations  |  Credit Crisis  |  Banking and Money  |  Paulson Bailout  |  California Standards Test: Algebra II  |  California Standards Test: Algebra I  |  California Standards Test: Geometry  |  Venture Capital and Capital Markets  |  Statistics  |  Geithner Plan  |  Current Economics

SAT Preparation We have taken all 8 math practice tests (432 problems) in "The Offical SAT Study Guide" by the College Board in 100+ videos ... [More] GMAT Preparation We have taken all 400+ data sufficiency and math problems in "The Official Guide for GMAT Review" by the GMAC in 100+ videos below. ... [More] California: Algebra II Sal has done all 80 problems from the Algebra II Standards Test (click to download) administered as part of the Standardized Testing and Reporting (STAR) Program under policies set by the State Board of Education. ... [More] Geithner Plan Geithner Plan I Geithner Plan II Geithner Plan 2.5 Geithner Plan III Geithner Plan IV Geithner 5: A better solution Current Economics Economics of a Cupcake Factory Cupcake Economics 2 Cupcake Economics 3 Inflation, Deflation & Capacity Utilization Inflation, Deflation & Capacity Utilization 2 Inflation & Deflation 3: Obama Stimulus Plan Unemployment CPI Index Paulson Bailout Bailout 1: Liquidity vs. Solvency 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 Bailout 10: Moral Hazard Bailout 11: Why these CDOs could be worth nothing Bailout 12: Lone Star Transaction Bailout 14: Possible Solution Bailout 15: More on the solution Credit Crisis The housing price conundrum Housing price conundrum (part 2) Housing Price Conundrum (part 3) Housing Conundrum (part 4) Mortgage-Backed Securities I Mortgage-backed securities II Mortgage-backed securities III Collateralized Debt Obligation (CDO) Bailout 13: Does the bailout have a chance of working? Credit Default Swaps Credit Default Swaps 2 Wealth Destruction 1 Wealth Destruction 2 Banking and Money Banking 1 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 (Bad sound) Banking 10: Introduction to leverage (bad sound) 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 The Discount Rate Repurchase Agreements (Repo transactions) Federal Reserve Balance Sheet Venture Capital and Capital Markets Raising money for a startup Getting a seed round from a VC Going back to the till: Series B An IPO More on IPOs Equity vs. Debt Bonds vs. Stocks Chapter 7:Bankruptcy Liquidation Chapter 11: Bankruptcy Restructuring Finance Introduction to interest Interest (part 2) Introduction to Present Value Present Value 2 Present Value 3 Present Value 4 (and discounted cash flow) Introduction to Balance Sheets More on balance sheets and equity Home equity loans Renting vs. Buying a home Renting vs. buying a home (part 2) Renting vs. Buying (detailed analysis) The housing price conundrum Housing price conundrum (part 2) Housing Price Conundrum (part 3) Housing Conundrum (part 4) Raising money for a startup Getting a seed round from a VC Going back to the till: Series B An IPO More on IPOs Bonds vs. Stocks Chapter 7:Bankruptcy Liquidation Chapter 11: Bankruptcy Restructuring Return on capital Mortgage-Backed Securities I Mortgage-backed securities II Mortgage-backed securities III Collateralized Debt Obligation (CDO) Introduction to the yield curve Introduction to compound interest and e Compound Interest and e (part 2) Compound Interest and e (part 3) Compound Interest and e (part 4) Bailout 1: Liquidity vs. Solvency 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 Bailout 10: Moral Hazard Credit Default Swaps Credit Default Swaps 2 Investment vs. Consumption 1 Investment vs. Comsumption 2 Bailout 11: Why these CDOs could be worth nothing Bailout 12: Lone Star Transaction Bailout 13: Does the bailout have a chance of working? Wealth Destruction 1 Wealth Destruction 2 Bailout 14: Possible Solution Bailout 15: More on the solution Banking 4: Multiplier effect and the money supply Banking 3: Fractional Reserve Banking Banking 2: A bank's income statement Banking 1 Banking 2: A bank's income statement Banking 3: Fractional Reserve Banking Banking 4: Multiplier effect and the money supply

Arithmetic Basic Addition Level 2 Addition Basic Subtraction Level 4 Subtraction Why borrowing works Level 4 multiplication Level 4 division Adding Decimals Subtracting decimals Multiplying decimals Dividing decimal Greatest Common Divisor Least Common Multiple Equivalent fractions Mixed numbers and improper fractions Converting fractions to decimals Percent and decimals Ordering numeric expressions Why borrowing works Pre-algebra Order of operations Order of operations II Adding/Subtracting negative numbers Multiplying and dividing negative numbers Adding and subtracting fractions Multiplying fractions Dividing fractions Level 1 Exponents Level 2 Exponents Level 3 exponents Negative Exponent Intuition Exponent Rules Part 1 Exponent Rules Part 2 Simplifying radicals Introduction to Logarithms Unit conversion Speed translation Introduction to logarithm properties Introduction to logarithm properties (part 2) Algebra Algebra: Linear Equations 1 Algebra: Linear Equations 2 Algebra: Linear Equations 3 Algebra: Linear Equations 4 Algebra: Solving Inequalities Algebra: graphing lines 1 Algebra: Slope and Y-intercept intuition Algebra: Slope Algebra: Slope 2 Algebra: Slope 3 Algebra: Equation of a line Averages Integer sums Taking percentages Growing by a percentage More percent problems systems of equations Introduction to Ratios Advanced ratio problems Age word problems 1 Age word problems 2 Age word problems 3 Level 1 multiplying expressions Solving a quadratic by factoring i and Imaginary numbers Complex Numbers (part 1) Complex Numbers (part 2) Introduction to the quadratic equation Quadratic Equation part 2 Completing the square Quadratic Formula (proof) Quadratic Inequalities Quadratic Inequalities (Visual Explanation) Introduction to functions Functions Part 2 Functions (Part III) Functions (part 4) Domain of a function Proof: log a + log b = log ab Proof: A(log B) = log (B^A), log A - log B = log (A/B) Proof: log_a (B) = (log_x (B))/(log_x (A)) Algebraic Long Division California Standards Test: Algebra I CA Algebra I: Number Properties and Absolute Value CA Algebra I: Simplifying Expressions CA Algebra I: Simple Logical Arguments CA Algebra I: Graphing Inequalities CA Algebra I: Slope and Y-intercept CA Algebra I: Systems of Inequalities CA Algebra I: Simplying Expressions CA Algebra I: Factoring Quadratics CA Algebra I: Completing the Square CA Algebra I: Quadratic Equation CA Algebra I: Quadratic Roots CA Algebra I: Rational Expressions CA Algebra I: Rational Expressions CA Algebra I: Word Problems CA Algebra I: More Word Problems CA Algebra I: Functions California Standards Test: Algebra II California Standards Test: Algebra II California Standards Test: Algebra II (Graphing Inequalities CA Standards: Algebra II (Algebraic Division/Multiplication) CA Standards: Algebra II Algebra II: Simplifying Polynomials Algebra II: Imaginary and Complex Numbers Algebra II: Complex numbers and conjugates Algebra II: Quadratics and Shifts Algebra II: Shifting Quadratic Graphs Algebra ||: Conic Sections Algebra II: Circles and Logarithms Algebra II: Logarithms Exponential Growth Algebra II: Logarithms and more Algebra II: Functions, Combinatorics Algebra II: binomial Expansion and Combinatorics Algebra II: Binomial Expansions, Geometric Series Sum Algebra II: Functions and Probability Algebra II: Probability and Statistics Algebra II: Mean and Standard Deviation Geometry Introduction to angles Angles (part 2) Angles (part 3) Angles of parallel lines The Angle Game Similar triangles Similar triangles (part 2) Angle Game (part 2) Introduction to the Pythagorean Theorem Pythagorean Theorem II 45-45-90 Triangles Intro to 30-60-90 Triangles 30-60-90 Triangles II California Standards Test: Geometry CA Geometry: deductive reasoning CA Geometry: Proof by Contradiction CA Geometry: More Proofs CA Geometry: Similar Triangles CA Geometry: Similar Triangles CA Geometry: More on cogruent and similar triangles CA Geometry: Triangles and Parallelograms CA Geometry: Area, Pythagorean Theorem CA Geometry: Area, Circumference, Volume CA Geometry: Pythagorean Theorem, Area CA Geometry: Exterior Angles CA Geometry: Deducing Angle Measures CA Geometry: Pythagorean Theorem, Compass Constructions CA Geometry: Compass Construction CA Geometry: Basic Trigonometry CA Geometry: More Trig CA Geometry: Circle Area Chords Tangent CA Geometry: Secants and Translations Trigonometry Basic Trigonometry Basic Trigonometry II Radians and degrees Using Trig Functions Using Trig Functions Part II The unit circle definition of trigonometric function Unit Circle Definition of Trig Functions Graph of the sine function Graphs of trig functions Graphing trig functions More trig graphs Determining the equation of a trigonometric function Trigonometric Identities Proof: sin(a+b) = (cos a)(sin b) + (sin a)(cos b) Proof: cos(a+b) = (cos a)(cos b)-(sin a)(sin b) Trig identities part 2 (parr 4 if you watch the proofs) Trig identies part 3 (part 5 if you watch the proofs) Trigonometry word problems (part 1) Trigonometry word problems (part 2) Law of cosines Navigation Word Problem Proof: Law of Sines Ferris Wheel Trig Problem Ferris Wheel Trig Problem (part 2) Fun Trig Problem Polar Coordinates 1 Polar Coordinates 2 Polar Coordinates 3

Statistics Statistics: The Average Statistics: Sample vs. Population Mean Statistics: Variance of a Population Statistics: Sample Variance Statistics: Standard Deviation Statistics: Alternate Variance Formulas Introduction to Random Variables Probability Density Functions Binomial Distribution 1 Binomial Distribution 2 Binomial Distribution 3 Binomial Distribution 4 Expected Value: E(X) Expected Value of Binomial Distribution Poisson Process 1 Poisson Process 2 Law of Large Numbers Normal Distribution Excel Exercise Probability Probability (part 1) Probability (part 2) Probability (part 3) Probability (part 4) Probability (part 5) Probability (part 6) Probability (part 7) Probability (part 8) Permutations Combinations Probability using Combinations Probability and Combinations (part 2) Conditional Probability and Combinations Birthday Probability Problem Introduction to Random Variables Probability Density Functions Binomial Distribution 1 Binomial Distribution 2 Binomial Distribution 3 Binomial Distribution 4 Expected Value: E(X) Expected Value of Binomial Distribution Poisson Process 1 Poisson Process 2 Law of Large Numbers Calculus Introduction to Limits Limit Examples (part 1) Limit Examples (part 2) Limit Examples (part3) Limit Examples w/ brain malfunction on first prob (part 4) Squeeze Theorem Proof: lim (sin x)/x More Limits