| 2009-10-26 | Rotation in R3 around the x-axis | Matrix transformations | Linear Algebra | Khan Academy | 12:18 | 224,472 | |
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| 2009-10-23 | Linear transformation examples: Rotations in R2 | Linear Algebra | Khan Academy | 17:52 | 274,525 | |
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| 2009-10-23 | Linear transformation examples: Scaling and reflections | Linear Algebra | Khan Academy | 15:13 | 239,036 | |
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| 2009-10-23 | More on matrix addition and scalar multiplication | Linear Algebra | Khan Academy | 10:41 | 67,606 | |
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| 2009-10-23 | Sums and scalar multiples of linear transformations | Linear Algebra | Khan Academy | 15:09 | 68,601 | |
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| 2009-10-22 | Preimage and kernel example | Matrix transformations | Linear Algebra | Khan Academy | 15:23 | 227,541 | |
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| 2009-10-22 | Preimage of a set | Matrix transformations | Linear Algebra | Khan Academy | 5:23 | 125,725 | |
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| 2009-10-22 | (2^ln x)/x Antiderivative Example | 8:40 | 212,244 | |
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| 2009-10-22 | im(T): Image of a transformation | Matrix transformations | Linear Algebra | Khan Academy | 16:37 | 253,283 | |
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| 2009-10-22 | Image of a subset under a transformation | Matrix transformations | Linear Algebra | Khan Academy | 18:11 | 144,260 | |
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| 2009-10-20 | Linear transformations as matrix vector products | Linear Algebra | Khan Academy | 17:32 | 437,590 | |
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| 2009-10-20 | Matrix vector products as linear transformations | Linear Algebra | Khan Academy | 17:04 | 266,447 | |
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| 2009-10-20 | Linear transformations | Matrix transformations | Linear Algebra | Khan Academy | 13:52 | 1,453,872 | |
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| 2009-10-20 | Vector transformations | Matrix transformations | Linear Algebra | Khan Academy | 14:19 | 363,305 | |
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| 2009-10-20 | A more formal understanding of functions | Matrix transformations | Linear Algebra | Khan Academy | 16:01 | 353,770 | |
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| 2009-10-19 | Khan Academy on Facebook | 2:18 | 31,994 | |
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| 2009-10-19 | Showing that the candidate basis does span C(A) | Vectors and spaces | Linear Algebra | Khan Academy | 13:40 | 66,540 | Show |
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| 2009-10-19 | Showing relation between basis cols and pivot cols | Linear Algebra | Khan Academy | 8:33 | 92,304 | Show |
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| 2009-10-18 | Dimension of the column space or rank | Vectors and spaces | Linear Algebra | Khan Academy | 12:48 | 474,245 | |
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| 2009-10-18 | Dimension of the null space or nullity | Vectors and spaces | Linear Algebra | Khan Academy | 13:59 | 348,043 | |
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| 2009-10-18 | Proof: Any subspace basis has same number of elements | Linear Algebra | Khan Academy | 21:35 | 101,651 | |
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| 2009-10-17 | Visualizing a column space as a plane in R3 | Vectors and spaces | Linear Algebra | Khan Academy | 21:11 | 123,626 | |
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| 2009-10-17 | Null space and column space basis | Vectors and spaces | Linear Algebra | Khan Academy | 25:13 | 737,633 | |
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| 2009-10-17 | Column space of a matrix | Vectors and spaces | Linear Algebra | Khan Academy | 10:40 | 414,881 | |
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| 2009-10-16 | Null space 3: Relation to linear independence | Vectors and spaces | Linear Algebra | Khan Academy | 11:35 | 160,233 | |
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| 2009-10-16 | Null space 2: Calculating the null space of a matrix | Linear Algebra | Khan Academy | 13:07 | 559,076 | |
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| 2009-10-16 | Introduction to the null space of a matrix | Vectors and spaces | Linear Algebra | Khan Academy | 10:23 | 588,000 | |
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| 2009-10-16 | Matrix vector products | Vectors and spaces | Linear Algebra | Khan Academy | 21:10 | 326,070 | |
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| 2009-10-15 | Matrices: Reduced row echelon form 3 | Vectors and spaces | Linear Algebra | Khan Academy | 12:08 | 244,001 | |
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| 2009-10-15 | Matrices: Reduced row echelon form 1 | Vectors and spaces | Linear Algebra | Khan Academy | 17:43 | 1,251,990 | |
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| 2009-10-15 | Matrices: Reduced row echelon form 2 | Vectors and spaces | Linear Algebra | Khan Academy | 7:37 | 525,594 | |
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| 2009-10-14 | Integrals: Trig Substitution 3 (long problem) | 17:52 | 269,907 | |
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| 2009-10-14 | Integrals: Trig Substitution 2 | 8:11 | 319,232 | |
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| 2009-10-14 | Integrals: Trig Substitution 1 | 7:38 | 716,096 | |
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| 2009-10-14 | Extreme derivative word problem (advanced) | Differential Calculus | Khan Academy | 23:13 | 239,693 | |
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| 2009-10-14 | Trig Implicit Differentiation Example | 12:08 | 189,234 | |
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| 2009-10-13 | Dot and cross product comparison/intuition | Vectors and spaces | Linear Algebra | Khan Academy | 19:14 | 278,384 | |
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| 2009-10-13 | Proof: Relationship between cross product and sin of angle | Linear Algebra | Khan Academy | 18:09 | 188,245 | |
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| 2009-10-13 | Cross product introduction | Vectors and spaces | Linear Algebra | Khan Academy | 15:47 | 588,345 | |
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| 2009-10-12 | Defining a plane in R3 with a point and normal vector | Linear Algebra | Khan Academy | 13:53 | 406,729 | |
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| 2009-10-12 | Defining the angle between vectors | Vectors and spaces | Linear Algebra | Khan Academy | 25:11 | 433,293 | |
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| 2009-10-10 | Vector triangle inequality | Vectors and spaces | Linear Algebra | Khan Academy | 18:53 | 238,226 | |
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| 2009-10-10 | Proof of the Cauchy-Schwarz inequality | Vectors and spaces | Linear Algebra | Khan Academy | 16:55 | 516,957 | |
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| 2009-10-10 | Proving vector dot product properties | Vectors and spaces | Linear Algebra | Khan Academy | 10:45 | 349,820 | |
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| 2009-10-09 | Vector dot product and vector length | Vectors and spaces | Linear Algebra | Khan Academy | 9:10 | 757,095 | |
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| 2009-10-09 | Basis of a subspace | Vectors and spaces | Linear Algebra | Khan Academy | 19:00 | 1,103,016 | |
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| 2009-10-09 | Linear subspaces | Vectors and spaces | Linear Algebra | Khan Academy | 23:29 | 1,459,935 | |
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| 2009-10-09 | Span and linear independence example | Vectors and spaces | Linear Algebra | Khan Academy | 16:53 | 690,371 | |
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| 2009-10-09 | More on linear independence | Vectors and spaces | Linear Algebra | Khan Academy | 17:38 | 531,429 | |
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| 2009-10-09 | Introduction to linear independence | Vectors and spaces | Linear Algebra | Khan Academy | 15:46 | 1,035,250 | |
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| 2009-10-08 | Linear combinations and span | Vectors and spaces | Linear Algebra | Khan Academy | 20:35 | 1,384,425 | |
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| 2009-10-08 | Parametric representations of lines | Vectors and spaces | Linear Algebra | Khan Academy | 24:46 | 688,423 | |
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| 2009-10-08 | Vector examples | Vectors and spaces | Linear Algebra | Khan Academy | 25:33 | 836,290 | |
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| 2009-10-08 | Linear Algebra: Introduction to Vectors | 16:31 | 465,852 | |
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| 2009-10-08 | Using the convolution theorem to solve an initial value prob | Laplace transform | Khan Academy | 12:14 | 231,392 | |
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| 2009-10-07 | The convolution and the laplace transform | Laplace transform | Khan Academy | 13:46 | 450,413 | |
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| 2009-10-07 | Introduction to the convolution | Laplace transform | Differential Equations | Khan Academy | 18:59 | 719,865 | |
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| 2009-10-07 | Trigonometry identity review/fun | Trig identities and examples | Trigonometry | Khan Academy | 11:07 | 696,543 | Review |
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| 2009-10-07 | Laplace transform of the dirac delta function | Laplace transform | Khan Academy | 12:13 | 306,002 | |
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| 2009-10-07 | Dirac delta function | Laplace transform | Differential Equations | Khan Academy | 17:48 | 577,271 | |
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| 2009-10-06 | Laplace/step function differential equation | Laplace transform | Khan Academy | 19:12 | 298,019 | |
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| 2009-10-06 | Inverse Laplace examples | Laplace transform | Differential Equations | Khan Academy | 19:15 | 561,094 | |
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| 2009-10-06 | Laplace transform of the unit step function | Laplace transform | Khan Academy | 24:15 | 794,498 | |
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| 2009-10-06 | Laplace transform of t^n: L{t^n} | Laplace transform | Differential Equations | Khan Academy | 10:16 | 254,028 | |
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| 2009-10-06 | Laplace transform of t: L{t} | Laplace transform | Differential Equations | Khan Academy | 9:06 | 275,869 | |
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| 2009-10-05 | Using the Laplace transform to solve a nonhomogeneous eq | Laplace transform | Khan Academy | 18:48 | 322,380 | |
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| 2009-10-04 | Viruses | 23:17 | 1,083,082 | |
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| 2009-10-03 | Proofs of derivatives of ln(x) and e^x | Taking derivatives | Differential Calculus | Khan Academy | 12:27 | 333,668 | |
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| 2009-10-02 | Bacteria | 18:26 | 1,130,933 | |
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| 2009-10-02 | Derivative of x^(x^x) | Taking derivatives | Differential Calculus | Khan Academy | 9:02 | 422,879 | |
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| 2009-10-02 | Multiplying multiple digit numbers | Multiplication and division | Arithmetic | Khan Academy | 10:27 | 1,230,979 | |
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| 2009-10-02 | 2-digit times a 2-digit number | Multiplication and division | Arithmetic | Khan Academy | 11:15 | 805,558 | |
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| 2009-10-01 | Inverse trig functions: arccos | Trigonometry | Khan Academy | 13:38 | 472,900 | |
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| 2009-10-01 | Inverse trig functions: arctan | Trigonometry | Khan Academy | 10:06 | 655,734 | |
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| 2009-10-01 | Inverse trig functions: arcsin | Trigonometry | Khan Academy | 10:36 | 1,704,185 | |
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| 2009-09-30 | Hardy-Weinberg Principle | 14:57 | 535,498 | |
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| 2009-09-30 | Punnett square fun | Biomolecules | MCAT | Khan Academy | 25:16 | 1,093,000 | |
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| 2009-09-30 | Introduction to Heredity | 17:27 | 1,566,177 | |
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| 2009-09-30 | Embryonic stem cells | Cells | MCAT | Khan Academy | 19:54 | 514,883 | |
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| 2009-09-30 | Cancer | Cells | MCAT | Khan Academy | 12:36 | 895,467 | |
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| 2009-09-29 | A look at a seductive but wrong Gibbs/spontaneity proof | Chemistry | Khan Academy | 6:40 | 54,538 | |
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| 2009-09-28 | More rigorous Gibbs free energy / spontaneity relationship | Chemistry | Khan Academy | 13:56 | 117,237 | |
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| 2009-09-28 | Gibbs free energy example | Thermodynamics | Chemistry | Khan Academy | 9:57 | 337,150 | |
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| 2009-09-28 | Gibbs free energy and spontaneity | Chemistry | Khan Academy | 17:40 | 619,433 | |
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| 2009-09-25 | Hess's law and reaction enthalpy change | Chemistry | Khan Academy | 15:40 | 936,277 | Let's Play |
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| 2009-09-25 | Heat of formation | Thermodynamics | Chemistry | Khan Academy | 12:35 | 489,640 | |
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| 2009-09-25 | Thermodynamic entropy definition clarification | Physics | Khan Academy | 15:38 | 432,476 | |
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| 2009-09-24 | Enthalpy | Thermodynamics | Chemistry | Khan Academy | 15:07 | 1,455,999 | Let's Play |
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| 2009-09-24 | Phases of Meiosis | 27:23 | 1,750,880 | |
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| 2009-09-24 | Phases of Mitosis | 20:42 | 1,544,878 | |
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| 2009-09-23 | Mitosis, Meiosis and Sexual Reproduction | 18:24 | 1,147,457 | |
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| 2009-09-23 | Chromosomes, Chromatids, Chromatin, etc. | 18:23 | 1,555,904 | |
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| 2009-09-23 | Variation in a Species | 19:51 | 506,306 | |
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| 2009-09-22 | DNA | 28:05 | 1,743,728 | |
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| 2009-09-21 | Natural Selection and the Owl Butterfly | 13:29 | 391,755 | |
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| 2009-09-21 | Introduction to Evolution and Natural Selection | 17:39 | 2,393,359 | |
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| 2009-09-19 | Carnot efficiency 2: Reversing the cycle | Thermodynamics | Physics | Khan Academy | 14:01 | 83,278 | |
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| 2009-09-19 | Carnot efficiency 3: Proving that it is the most efficient | Physics | Khan Academy | 12:17 | 76,398 | |
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| 2009-09-18 | Efficiency of a Carnot engine | Thermodynamics | Physics | Khan Academy | 14:04 | 222,744 | |
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| 2009-09-18 | Multiplication 3: 10,11,12 times tables | Multiplication and division | Arithmetic | Khan Academy | 12:11 | 568,509 | |
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