Video_Lessons

Here are many videos from Khan Academy:

Algebra
Topics covered from very basic algebra all the way through algebra II. This is the best algebra playlist to start at if you've never seen algebra before. Once you get your feet wet, you may want to try some of the videos in the "Algebra I Worked Examples" playlist.  [|Back]==Algebra I Worked Examples== 180 Worked Algebra I examples (problems written by the Monterey Institute of Technology and Education). You should look at the "Algebra" playlist if you've never seen algebra before or if you want instruction on topics in Algebra II. Use this playlist to see a ton of example problems in every topic in the California Algebra I Standards. If you can do all of these problems on your own, you should probably test out of Algebra I (seriously).
 * 1) [|Simple Equations]
 * 2) [|Equations 2]
 * 3) [|Equations 3]
 * 4) [|Algebra: Linear Equations 4]
 * 5) [|Algebra: Solving Inequalities]
 * 6) [|Algebra: graphing lines 1]
 * 7) [|Algebra: Slope and Y-intercept intuition]
 * 8) [|Algebra: Slope]
 * 9) [|Algebra: Slope 2]
 * 10) [|Algebra: Slope 3]
 * 11) [|Algebra: Equation of a line]
 * 12) [|Slope and Y-intercept Intuition]
 * 13) [|Averages]
 * 14) [|Integer sums]
 * 15) [|Taking percentages]
 * 16) [|Growing by a percentage]
 * 17) [|Another Percent Word Problem]
 * 18) [|More percent problems]
 * 19) [|systems of equations]
 * 20) [|Introduction to Ratios (new HD version)]
 * 21) [|Ratio problem with basic algebra (new HD)]
 * 22) [|More advanced ratio problem--with Algebra (HD version)]
 * 23) [|Alternate Solution to Ratio Problem (HD Version)]
 * 24) [|Introduction to Ratios]
 * 25) [|Advanced ratio problems]
 * 26) [|Age word problems 1]
 * 27) [|Age word problems 2]
 * 28) [|Age word problems 3]
 * 29) [|Level 1 multiplying expressions]
 * 30) [|Solving a quadratic by factoring]
 * 31) [|Introduction to i and Imaginary Numbers]
 * 32) [|Calculating i Raised to Arbitrary Exponents]
 * 33) [|i as the Principal Root of -1 (a little technical)]
 * 34) [|Complex Numbers (part 1)]
 * 35) [|Complex Numbers (part 2)]
 * 36) [|Introduction to the quadratic equation]
 * 37) [|Quadratic Equation part 2]
 * 38) [|Completing the square]
 * 39) [|Quadratic Formula (proof)]
 * 40) [|Quadratic Inequalities]
 * 41) [|Quadratic Inequalities (Visual Explanation)]
 * 42) [|Introduction to functions]
 * 43) [|Functions Part 2]
 * 44) [|Functions (Part III)]
 * 45) [|Functions (part 4)]
 * 46) [|Domain of a function]
 * 47) [|Proof: log a + log b = log ab]
 * 48) [|Proof: A(log B) = log (B^A), log A - log B = log (A/B)]
 * 49) [|Proof: log_a (B) = (log_x (B))/(log_x (A))]
 * 50) [|Algebraic Long Division]
 * 51) [|Introduction to Conic Sections]
 * 52) [|Conic Sections: Intro to Circles]
 * 53) [|Conic Sections: Intro to Ellipses]
 * 54) [|Conic Sections: Intro to Hyperbolas]
 * 55) [|Conic Sections: Hyperbolas 2]
 * 56) [|Conic Sections: Hyperbolas 3]
 * 57) [|Identifying Conics 1]
 * 58) [|Identifying Conics 2]
 * 59) [|Conic Identification 3]
 * 60) [|Foci of an Ellipse]
 * 61) [|Foci of a Hyperbola]
 * 62) [|Proof: Hyperbola Foci]
 * 63) [|Partial Fraction Expansion 1]
 * 64) [|Partial Fraction Expansion 2]
 * 65) [|Partial Fraction Expansion 3]
 * 66) [|Parabola Focus and Directrix 1]
 * 67) [|Focus and Directrix of a Parabola 2]
 * 68) [|Two Passing Bicycles Word Problem]
 * 69) [|Passed Bike Word Problem]
 * 70) [|Passing Trains]
 * 71) [|Overtaking Word Problem]
 * 72) [|Early Train Word Problem]
 * 73) [|Officer on Horseback]
 * 74) [|Rational Inequalities]
 * 75) [|Rational Inequalities 2]
 * 76) [|Interesting Polynomial Coefficient Problem]
 * 77) [|Geometric series sum to figure out mortgage payments]
 * 78) [|Introduction to Function Inverses]
 * 79) [|Function Inverse Example 1]
 * 80) [|Function Inverses Example 2]
 * 81) [|Function Inverses Example 3]
 * 82) [|Direct and Inverse Variation]
 * 83) [|Recognizing Direct and Inverse Variation]
 * 84) [|Recognizing Odd and Even Functions]
 * 85) [|Connection between even and odd numbers and functions]
 * 86) [|New Operator Definitions]
 * 87) [|Proof by Induction]
 * 88) [|Alternate Proof to Induction for Integer Sum]
 * 89) [|Writing Proportions]
 * 1) [|Solving Equations 1]
 * 2) [|Solving Equations 2]
 * 3) [|Solving Equations with the Distributive Property]
 * 4) [|Solving equations with the distributive property 2]
 * 5) [|Algebraic Word Problem]
 * 6) [|Sum of Consecutive Odd Integers]
 * 7) [|Example of Solving for a Variable]
 * 8) [|Solving for a Variable 2]
 * 9) [|Absolute Value 1]
 * 10) [|Absolute Value and Number Lines]
 * 11) [|Absolute Value Equations 1]
 * 12) [|Absolute Value Equation Example 2]
 * 13) [|Patterns in Sequences 1]
 * 14) [|Patterns in Sequences 2]
 * 15) [|Equations of Sequence Patterns]
 * 16) [|Finding the 100th Term in a Sequence]
 * 17) [|Functional Relationships 1]
 * 18) [|Testing if a relationship is a function]
 * 19) [|Domain and Range 1]
 * 20) [|Domain and Range 2]
 * 21) [|Direct Variation 1]
 * 22) [|Basic Rate Problem]
 * 23) [|Basic Linear Function]
 * 24) [|Exploring linear relationships]
 * 25) [|Recognizing Linear Functions]
 * 26) [|Exploring nonlinear relationships]
 * 27) [|Slope of a line]
 * 28) [|Slope Example]
 * 29) [|X and Y intercepts]
 * 30) [|X and Y intercepts 2]
 * 31) [|Graphing a line in slope intercept form]
 * 32) [|Equation of a line]
 * 33) [|Converting to slope-intercept form]
 * 34) [|Point-slope and standard form]
 * 35) [|Parallel Lines]
 * 36) [|Parallel Lines 2]
 * 37) [|Parallel lines 3]
 * 38) [|Perpendicular Lines]
 * 39) [|Perpendicular lines 2]
 * 40) [|Interpreting Inequalities]
 * 41) [|Solving Inequalities]
 * 42) [|Inequalities]
 * 43) [|Absolute value inequalities]
 * 44) [|Absolute Inequalities 2]
 * 45) [|Absolute value inequalities 3]
 * 46) [|Writing and using inequalities]
 * 47) [|Writing and using inequalities 2]
 * 48) [|Writing and using inequalities 3]
 * 49) [|Solving and graphing linear inequalities in two variables]
 * 50) [|Graphing linear inequalities in two variables]
 * 51) [|Graphing linear inequalities in two variables]
 * 52) [|Solving systems by graphing]
 * 53) [|Solving systems by graphing 2]
 * 54) [|Solving systems by graphing 3]
 * 55) [|Solving systems by substitution 1]
 * 56) [|Solving systems by substitution 2]
 * 57) [|Solving systems by substitution 3]
 * 58) [|Solving systems by elimination]
 * 59) [|Solving systems by elimination 2]
 * 60) [|Solving systems by elimination 3]
 * 61) [|Systems and rate problems]
 * 62) [|Systems and rate problems 2]
 * 63) [|Systems and rate problems 3]
 * 64) [|Mixture problems 1]
 * 65) [|Mixture problems 2]
 * 66) [|Mixture problems 3]
 * 67) [|Graphing systems of inequalities]
 * 68) [|Graphing systems of inequalities 2]
 * 69) [|Graphing systems of inequalities 3]
 * 70) [|Exponent Rules 1]
 * 71) [|Exponent Rules 2]
 * 72) [|Exponent Rules 3]
 * 73) [|Scientific notation 1]
 * 74) [|Scientific notation 2]
 * 75) [|Scientific notation 3]
 * 76) [|Simplifying Expressions with Exponents]
 * 77) [|Simplifying Expressions with Exponents 2]
 * 78) [|Simplifying Expressions with Exponents 3]
 * 79) [|Pythagorean Theorem 1]
 * 80) [|Pythagorean Theorem 2]
 * 81) [|Pythagorean Theorem 3]
 * 82) [|Simplifying Radical Expressions1]
 * 83) [|Simplifying Radical Expressions 2]
 * 84) [|Simplifying Radical Expressions 3]
 * 85) [|Solving Radical Equations 1]
 * 86) [|Solving Radical Equations 2]
 * 87) [|Solving Radical Equations 3]
 * 88) [|Applying Radical Equations 1]
 * 89) [|Applying Radical Equations 2]
 * 90) [|Applying Radical Equations 3]
 * 91) [|Fractional Exponent Expressions 1]
 * 92) [|Fractional Exponent Expressions 2]
 * 93) [|Fractional Exponent Expressions 3]
 * 94) [|Multiplying and Dividing Monomials 1]
 * 95) [|Multiplying and Dividing Monomials 2]
 * 96) [|Multiplying and Dividing Monomials 3]
 * 97) [|Polynomials1]
 * 98) [|Polynomials 2]
 * 99) [|Adding and Subtracting Polynomials 1]
 * 100) [|Adding and Subtracting Polynomials 2]
 * 101) [|Adding and Subtracting Polynomials 3]
 * 102) [|Multiplying Polynomials1]
 * 103) [|Multiplying Polynomials 2]
 * 104) [|Multiplying Polynomials 3]
 * 105) [|Special Products of Polynomials 1]
 * 106) [|Special Products of Polynomials 2]
 * 107) [|U08_L2_T4_we3 Special Products of Polynomials 3]
 * 108) [|Bay Area CBS Station with Salman Khan]
 * 109) [|Factoring and the Distributive Property]
 * 110) [|Factoring and the Distributive Property 2]
 * 111) [|Factoring and the Distributive Property 3]
 * 112) [|Factoring Trinomials by Grouping 1]
 * 113) [|Factoring Trinomials by Grouping 2]
 * 114) [|U09_L1_T2_we3 Factoring Trinomials by Grouping 3]
 * 115) [|Factoring Trinomials by Grouping 4]
 * 116) [|Factoring Trinomials by Grouping 5]
 * 117) [|Factoring Trinomials by Grouping 6]
 * 118) [|U09_L2_T1_we1 Factoring Special Products 1]
 * 119) [|Factoring Special Products 2]
 * 120) [|U09_L2_T1_we3 Factoring Special Products 3]
 * 121) [|Solving Quadratic Equations by Factoring.avi]
 * 122) [|Solving Quadratic Equations by Factoring 2.avi]
 * 123) [|Solving Quadratic Equations by Factoring 3.avi]
 * 124) [|Quadratic Functions 1]
 * 125) [|Quadratic Functions 2]
 * 126) [|Quadratic Functions 3]
 * 127) [|Completing the Square 1]
 * 128) [|Completing the Square 2]
 * 129) [|Completing the Square 3]
 * 130) [|Completing the Square 4]
 * 131) [|Quadratic Formula 1]
 * 132) [|Quadratic Formula 2]
 * 133) [|Quadratic Formula 3]
 * 134) [|Applying Quadratic Functions 1]
 * 135) [|Applying Quadratic Functions 2]
 * 136) [|Applying Quadratic Functions 3]
 * 137) [|Non-Linear Systems of Equations 1]
 * 138) [|Non-Linear Systems of Equations 2]
 * 139) [|Non-Linear Systems of Equations 3]
 * 140) [|Simplifying Rational Expressions 1]
 * 141) [|Simplifying Rational Expressions 2]
 * 142) [|Simplifying Rational Expressions 3]
 * 143) [|Multiplying and Dividing Rational Expressions 1]
 * 144) [|Multiplying and Dividing Rational Expressions 2]
 * 145) [|Multiplying and Dividing Rational Expressions 3]
 * 146) [|Adding and Subtracting Rational Expressions 1]
 * 147) [|Adding and Subtracting Rational Expressions 2]
 * 148) [|Adding and Subtracting Rational Expressions 3]
 * 149) [|Solving Rational Equations 1]
 * 150) [|Solving Rational Equations 2]
 * 151) [|Solving Rational Equations 3]
 * 152) [|Applying Rational Equations 1]
 * 153) [|Applying Rational Equations 2]
 * 154) [|Applying Rational Equations 3]
 * 155) [|Number Sets 1]
 * 156) [|Number Sets 2]
 * 157) [|Number Sets 3]
 * 158) [|Understanding Logical Statements 1]
 * 159) [|Understanding Logical Statements 2]
 * 160) [|Understanding Logical Statements 3]
 * 161) [|Understanding Logical Statements 4]
 * 162) [|Understanding Logical Statements Commentary]
 * 163) [|U12_L1_T3_we1 Inductive Reasoning 1]
 * 164) [|Inductive Reasoning 2]
 * 165) [|Inductive Reasoning 3]
 * 166) [|Deductive Reasoning 1]
 * 167) [|Deductive Reasoning 2]
 * 168) [|Deductive Reasoning 3]
 * 169) [|Events and Outcomes 1]
 * 170) [|Events and Outcomes 2]
 * 171) [|Events and Outcomes 3]
 * 172) [|U12_L2_T2_we1 Independent Events 1]
 * 173) [|Independent Events 2]
 * 174) [|Independent Events 3]
 * 175) [|Permutations and Combinations 1]
 * 176) [|Permutations and Combinations 2]
 * 177) [|Permutations and Combinations 3]
 * 178) [|Permutations and Combinations 4]
 * 179) [|Probability of Dependent Events]
 * 180) [|Probability of Dependent Events 2]
 * 181) [|U02_L2_T2_we1 Absolute Value Equations.avi]
 * 182) [|U06_L3_T1_we3 Graphing Systems of Inequalities]
 * 183) [|U06_L1_T1_we1 Solving Systems by Graphing]
 * 184) [|U05_L2_T1_WE2 Graphing Linear Inequalities in Two Variables]
 * 185) [|U03_L2_T1_we2 Representing Functions as Graphs]
 * 186) [|U03_L1_T1_we2 Inductive Patterns]

Geometry
Videos on geometry. Basic understanding of Algebra I necessary. After this, you'll be ready for Trigonometry. 
 * 1)  [|Introduction to angles]
 * 2)  [|Angles (part 2)]
 * 3)  [|Angles (part 3)]
 * 4)  [|Angles formed between transversals and parallel lines]
 * 5)  [|Angles of parallel lines 2]
 * 6)  [|The Angle Game]
 * 7)  [|Similar triangles]
 * 8)  [|Similar triangles (part 2)]
 * 9)  [|Angle Game (part 2)]
 * 10)  [|Acute Right and Obtuse Angles]
 * 11)  [|Area and Perimeter]
 * 12)  [|Circles: Radius, Diameter and Circumference]
 * 13)  [|Area of a circle]
 * 14)  [|The Pythagorean Theorem]
 * 15)  [|Pythagorean Theorem II]
 * 16) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|45-45-90 Triangles]
 * 17) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Intro to 30-60-90 Triangles]
 * 18) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|30-60-90 Triangles II]
 * 19) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Solid Geometry Volume]
 * 20) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Cylinder Volume and Surface Area]
 * 21) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Heron's Formula]
 * 22) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Part 1 of Proof of Heron's Formula]
 * 23) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Part 2 of the Proof of Heron's Formula]
 * 24) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|An inscribed angle is half of a central angle that subtends the same arc]
 * 25) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Area of Inscribed Equilateral Triangle (some basic trig used)]
 * 26) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Right Triangles Inscribed in Circles (Proof)]
 * 27) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Area of Diagonal Generated Triangles of Rectangle are Equal]
 * 28) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Triangle Medians and Centroids]
 * 29) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Triangle Medians and Centroids (2D Proof)]
 * 30) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Rhombus Diagonals]
 * 31) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|2003 AIME II Problem 7]
 * 32) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Measuring Angles]
 * 33) <span style="color: #666666; font-size: 12px; font-size: 12px; vertical-align: baseline; vertical-align: baseline;"> [|Lines, Line Segments, and Rays]