| 2013-12-23 | Proof that there is an irrational number between any two rational numbers | Algebra I | Khan Academy | 5:33 | 135,650 | |
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| 2013-12-23 | Sum and product of rational numbers | Rational and irrational numbers | Algebra I | Khan Academy | 2:46 | 181,240 | |
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| 2013-12-23 | Proof that square root of prime number is irrational | Algebra I | Khan Academy | 7:28 | 205,015 | |
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| 2013-12-23 | Proof that square root of 2 is irrational | Algebra I | Khan Academy | 7:47 | 535,304 | |
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| 2013-12-23 | Recognizing rational and irrational expressions example | Algebra I | Khan Academy | 2:36 | 145,494 | |
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| 2013-12-23 | Approximating irrational number exercise example | Pre-Algebra | Khan Academy | 3:36 | 99,543 | |
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| 2013-12-23 | Proof that rational times irrational is irrational | Algebra I | Khan Academy | 3:15 | 128,826 | |
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| 2013-12-23 | Proof that sum of rational and irrational is irrational | Algebra I | Khan Academy | 3:24 | 158,925 | |
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| 2013-12-19 | Matching radical functions with graphs exercise example | Algebra II | Khan Academy | 3:41 | 85,770 | |
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| 2013-12-19 | Equations for radical functions example | Functions and their graphs | Algebra II | Khan Academ | 5:30 | 21,445 | |
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| 2013-12-19 | Flipping and shifting radical functions | Functions and their graphs | Algebra II | Khan Academy | 7:15 | 240,230 | |
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| 2013-12-19 | Absolute value graphing exercise example | Functions and their graphs | Algebra II | Khan Academy | 3:12 | 119,616 | |
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| 2013-12-19 | Graphs of absolute value functions | Functions and their graphs | Algebra II | Khan Academy | 8:34 | 453,892 | |
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| 2013-12-19 | Polynomial end behavior exercise example | Algebra II | Khan Academy | 2:34 | 18,807 | |
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| 2013-12-19 | Another polynomial end behavior example | Algebra II | Khan Academy | 7:04 | 22,178 | |
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| 2013-12-19 | Polynomial end behavior example | Polynomial and rational functions | Algebra II | Khan Academy | 5:43 | 36,932 | |
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| 2013-12-19 | Polynomial end behavior | Polynomial and rational functions | Algebra II | Khan Academy | 8:10 | 692,866 | |
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| 2013-12-19 | Using the Pythagorean trig identity | Trig identities and examples | Trigonometry | Khan Academy | 6:15 | 285,181 | |
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| 2013-12-18 | Pythagorean trig identity from unit circle | Trigonometry | Khan Academy | 6:12 | 173,510 | |
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| 2013-12-18 | Pythagorean trig identity from soh cah toa | Trigonometry | Khan Academy | 4:16 | 194,178 | |
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| 2013-12-18 | Decay of cesium 137 example | Exponential and logarithmic functions | Algebra II | Khan Academy | 9:13 | 59,190 | Vlog |
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| 2013-12-18 | Constructing linear and exponential functions from data | Algebra II | Khan Academy | 5:17 | 279,910 | |
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| 2013-12-18 | Introduction to complex numbers | Imaginary and complex numbers | Algebra II | Khan Academy | 4:39 | 254,837 | |
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| 2013-12-17 | Quadratic inequality example 2 | Functions and their graphs | Algebra II | Khan Academy | 7:54 | 105,570 | |
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| 2013-12-17 | Quadratic inequality example | Functions and their graphs | Algebra II | Khan Academy | 7:41 | 248,110 | |
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| 2013-12-17 | Rewriting a quadratic function to find roots and vertex | Algebra I | Khan Academy | 8:29 | 346,810 | |
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| 2013-12-17 | Simplifying with exponent properties | Exponent expressions and equations | Algebra I | Khan Academy | 2:51 | 169,267 | |
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| 2013-12-17 | Exponential equation with rational answer | Exponent expressions | Algebra I | Khan Academy | 4:02 | 221,422 | |
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| 2013-12-16 | Quadratic inequality word problem | Functions and their graphs | Algebra II | Khan Academy | 10:00 | 52,188 | |
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| 2013-12-16 | Making more pizzas to spread cost per pizza | Functions and their graphs | Algebra II | Khan Academy | 9:00 | 63,958 | |
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| 2013-12-16 | Dividing polynomials with remainders example | Algebra II | Khan Academy | 2:41 | 113,335 | |
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| 2013-12-16 | Polynomial remainder theorem to determine coefficient example | 3:13 | 40,658 | |
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| 2013-12-14 | Factoring 5th degree polynomial to find real zeros | Algebra II | Khan Academy | 8:02 | 331,139 | |
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| 2013-12-14 | Identifying graph based on roots | Polynomial and rational functions | Algebra II | Khan Academy | 5:27 | 222,132 | |
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| 2013-12-13 | Intersecting functions example | 7:30 | 31,905 | |
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| 2013-12-13 | Determining the equation of a trig function | Graphs of trig functions | Trigonometry | Khan Academy | 5:22 | 464,955 | |
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| 2013-12-13 | Plotting maxima, minima and midline intersections of trig function | Trigonometry | Khan Academy | 8:56 | 89,385 | |
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| 2013-12-13 | Ratio between concentric arcs | Trigonometry | Khan Academy | 3:15 | 74,411 | |
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| 2013-12-13 | Midline, amplitude and period of a function | Graphs of trig functions | Trigonometry | Khan Academy | 4:58 | 696,015 | |
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| 2013-12-13 | Finding arc length from radian angle measure | Trigonometry | Khan Academy | 2:39 | 285,821 | |
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| 2013-12-11 | Triangle similarity in pool | Similarity | Geometry | Khan Academy | 6:49 | 54,826 | |
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| 2013-12-11 | Golden ratio and Rembrandt's self portrait | Similarity | Geometry | Khan Academy | 8:23 | 76,356 | |
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| 2013-12-11 | Golden ratio to find radius of moon | Similarity | Geometry | Khan Academy | 6:22 | 45,834 | |
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| 2013-12-11 | Ratios of distances between colinear points | Analytic geometry | Geometry | Khan Academy | 5:38 | 189,600 | |
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| 2013-12-11 | Finding a point part way between two points | Analytic geometry | Geometry | Khan Academy | 4:40 | 269,085 | |
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| 2013-12-11 | Identifying similar triangles in the coordinate plane | Analytic geometry | Geometry | Khan Academy | 10:21 | 37,424 | |
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| 2013-12-11 | Classifying a quadrilateral on the coordinate plane | Analytic geometry | Geometry | Khan Academy | 5:08 | 89,897 | |
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| 2013-12-10 | Recognizing points on a circle | Analytic geometry | Geometry | Khan Academy | 10:21 | 94,344 | |
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| 2013-12-10 | Similarity to define sine, cosine, and tangent | Basic trigonometry | Trigonometry | Khan Academy | 8:56 | 437,461 | |
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| 2013-12-10 | Showing relationship between cosine and sine of complements | Trigonometry | Khan Academy | 4:15 | 272,904 | |
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| 2013-12-10 | Sine and cosine of complements example | Basic trigonometry | Trigonometry | Khan Academy | 4:05 | 221,770 | |
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| 2013-12-10 | Thiago asks: How much time does a goalkeeper have to react to a penalty kick? | Khan Academy | 12:05 | 106,002 | |
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| 2013-12-10 | Angle to aim to get alien | Basic trigonometry | Trigonometry | Khan Academy | 4:35 | 324,358 | |
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| 2013-12-10 | How much of a pyramid is submerged | Basic trigonometry | Trigonometry | Khan Academy | 5:44 | 168,989 | |
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| 2013-12-10 | Example with trig functions and ratios | Basic trigonometry | Trigonometry | Khan Academy | 5:07 | 206,372 | |
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| 2013-12-10 | Example relating trig function to side ratios | Basic trigonometry | Trigonometry | Khan Academy | 9:24 | 172,212 | |
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| 2013-12-09 | Pythagorean theorem and radii of circles | Circles | Geometry | Khan Academy | 5:53 | 53,928 | |
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| 2013-12-09 | Equation for a circle using the Pythagorean Theorem | Circles | Geometry | Khan Academy | 6:19 | 253,423 | |
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| 2013-12-09 | Hypotenuse of right triangle inscribed in circle | Circles | Geometry | Khan Academy | 2:33 | 96,293 | |
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| 2013-12-09 | Example with tangent and radius | Circles | Geometry | Khan Academy | 2:34 | 190,405 | |
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| 2013-12-09 | Measure of circumscribed angle | Circles | Geometry | Khan Academy | 3:47 | 140,350 | |
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| 2013-12-05 | Help support Khan Academy | 0:51 | 72,286 | |
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| 2013-12-05 | Solving a consecutive integer problem algebraically | Linear equations | Algebra I | Khan Academy | 5:19 | 722,700 | |
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| 2013-11-27 | Power series intro | Series | AP Calculus BC | Khan Academy | 6:49 | 693,066 | |
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| 2013-11-27 | Geometric series interval of convergence | Series | AP Calculus BC | Khan Academy | 5:32 | 132,089 | |
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| 2013-11-27 | Geometric series as a function | Series | AP Calculus BC | Khan Academy | 4:37 | 107,600 | |
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| 2013-11-27 | y-intercept of tangent line example | Derivative applications | Differential Calculus | Khan Academy | 5:59 | 147,139 | |
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| 2013-11-27 | Equation of normal line | Derivative applications | Differential Calculus | Khan Academy | 5:27 | 319,937 | |
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| 2013-11-27 | Equation of tangent line example 1 | Derivative applications | Differential Calculus | Khan Academy | 7:17 | 261,363 | |
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| 2013-11-27 | Expressing function defined as infinite series | 2:27 | 18,259 | |
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| 2013-11-27 | Power series function representation using algebra | 8:30 | 58,736 | |
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| 2013-11-27 | Leveraging properties of series to find sum | 6:54 | 94,159 | |
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| 2013-11-27 | Alternate formula for sum of n squares | 4:51 | 75,673 | |
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| 2013-11-27 | Finding the sum of n squares part 2 | 5:12 | 100,407 | |
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| 2013-11-26 | Finding the sum of n squares part 1 | 6:16 | 198,279 | |
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| 2013-11-26 | Partial fraction decomposition to find sum of telescoping series | 12:31 | 279,806 | |
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| 2013-11-26 | Explicitly defining a series | 4:25 | 118,237 | |
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| 2013-11-26 | Writing a series in sigma notation | 3:16 | 294,419 | |
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| 2013-11-26 | Worked example: sequence convergence/divergence | Series | AP Calculus BC | Khan Academy | 3:53 | 463,795 | |
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| 2013-11-25 | Sn1 and Sn2 solvents effects | 7:50 | 164,293 | |
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| 2013-11-25 | Sn2 stereochemistry | Substitution and elimination reactions | Organic chemistry | Khan Academy | 5:33 | 131,946 | |
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| 2013-11-25 | Sn1 reactions intro | 21:39 | 98,167 | |
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| 2013-11-25 | Steric hindrance | Substitution and elimination reactions | Organic chemistry | Khan Academy | 7:14 | 227,529 | |
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| 2013-11-25 | Sn2 reactions | Substitution and elimination reactions | Organic chemistry | Khan Academy | 8:17 | 316,299 | |
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| 2013-11-20 | Rent control and deadweight loss | Microeconomics | Khan Academy | 11:12 | 181,405 | |
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| 2013-11-20 | Multiplying: 4 digits times 1 digit (using grid) | 4th grade | Khan Academy | 3:34 | 346,131 | |
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| 2013-11-18 | Multiplying: 2 digits numbers (using distributive property) | 4th grade | Khan Academy | 6:58 | 417,312 | |
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| 2013-11-18 | Formula for continuously compounding interest | Finance & Capital Markets | Khan Academy | 8:59 | 396,544 | |
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| 2013-11-18 | e as a limit | Interest and debt | Finance & Capital Markets | Khan Academy | 5:39 | 247,383 | |
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| 2013-11-18 | e and compound interest | Interest and debt | Finance & Capital Markets | Khan Academy | 11:38 | 373,354 | |
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| 2013-11-15 | Optimal turns at Indianapolis Motor Speedway with JR Hildebrand | Physics | Khan Academy | 6:25 | 106,601 | |
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| 2013-11-08 | Structure in rational expression | Polynomial and rational functions | Algebra II | Khan Academy | 4:41 | 35,120 | |
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| 2013-11-08 | Structure in exponential expression | Polynomial and rational functions | Algebra II | Khan Academy | 7:19 | 29,515 | |
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| 2013-11-08 | Formula for a finite geometric series | Sequences, series and induction | Precalculus | Khan Academy | 9:38 | 279,750 | |
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| 2013-11-08 | Sigma notation for sums | Sequences, series and induction | Precalculus | Khan Academy | 4:27 | 1,236,651 | |
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| 2013-11-08 | Geometric sequence or progression | 4:39 | 161,059 | |
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| 2013-11-08 | Geometric series | Sequences, series and induction | Precalculus | Khan Academy | 4:28 | 398,428 | |
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| 2013-11-08 | Another derivation of the sum of an infinite geometric series | Precalculus | Khan Academy | 7:54 | 160,802 | |
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| 2013-11-08 | Repeating decimal as infinite geometric series | Precalculus | Khan Academy | 8:02 | 115,976 | |
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| 2013-11-08 | Sum of an infinite geometric series | Sequences, series and induction | Precalculus | Khan Academy | 4:46 | 485,544 | |
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