Khan Academy is a free, interactive website in which students can choose whatever subjects and/or courses they are struggling with from Basic Math to AP Calculus BC. So if your child is looking for a free, quick guide to math, definitely check out one of the math Cliffs Notes!įor Grades: 3rd through 12th grade, plus SAT, LSAT, GMAT, and many other types of test prep courses Calculus: Precalculus, Trigonometry, Calculus, Differential Equations.
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