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Differential Equations
Calculus Antiderivatives and Differential Equations
How to solve simple differential equations.
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The Product Rule
Calculus Techniques of Differentiation
How to differentiate a product of two functions.
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What to Do (and Not to Do) the Night Before the PSAT
PSAT PSAT Prep
The things you should (and should not) do the night before the PSAT
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Separate & Unequal
AP US History AP US History Videos
Review Reconstruction and examine the rise of big business in the second half of the 19th Century.
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Cladistics
Biology Classification
The definition and explanation of cladistics.
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History as Mystery
AP US History AP US History Videos
Outsmart the AP U.S. History test and pick up guaranteed strategies for test success.
Multiple choice questions 
How to Complete the UC Application
College counseling Make your college application shine
A video that shows you how to fill out the Test Scores section of the UC Application. A college admissions counselor explains how to report SAT, ACT, AP, IB, and TOEFL test scores.
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Area of a Segment
Geometry Area
How to derive the area of a segment formula.
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The Cosine Addition Formulas
Trigonometry Advanced Trigonometry
How to derive the cosine of a difference formula.
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The Sine Addition Formulas
Trigonometry Advanced Trigonometry
How to derive the sine of a sum formula.
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The Cosine Addition Formulas
Precalculus Advanced Trigonometry
How to derive the cosine of a difference formula.
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The Sine Addition Formulas
Precalculus Advanced Trigonometry
How to derive the sine of a sum formula.
cosine of a difference formula the cofunction identities the sine of a sum formula 
ACT Grammar
ACT ACT English
Short, helpful video on ACT grammar by top ACT prep instructor, Devorah. Videos are produced by leading online education provider, Brightstorm.
Commonly tested grammar punctuation and sentence structure skills 
ACT English Strategy
ACT ACT English
Short, helpful video on ACT English strategies by top ACT prep instructor, Devorah. Videos are produced by leading online education provider, Brightstorm.
Commonly tested strategy organization and style skills 
The Quotient Rule
Calculus Techniques of Differentiation
How to differentiate a quotient of two functions.
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The Method of Substitution
Calculus Antiderivatives and Differential Equations
How to evaluate an indefinite integral using the method of substitution.
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Simple Substitutions
Calculus Antiderivatives and Differential Equations
How to use the method of substitution to avoid common integration mistakes.
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Position, Velocity and Acceleration
Calculus Antiderivatives and Differential Equations
How to solve position, velocity and acceleration problems using differentiation equations.
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