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I am going to work through every problem in the College Board "Official SAT Study Guide." You should take the practice tests on your own, grade them and then use these videos to understand the problem

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Healthcare and Medicine - Khan Academy 29 lessons

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Topics covered in the first two or three semesters of college calculus. Everything from limits to derivatives to integrals to vector calculus. About Khan Academy: Khan Academy offers practice exerc

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Cryptography - Khan Academy 5 lessons

The basic ideas of cryptography as told by Brit Cruise

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Fundamentals of Biology focuses on the basic principles of biochemistry, molecular biology, genetics, and recombinant DNA. These principles are necessary to understanding the basic mechanisms of life

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Arithmetic - Khan Academy 38 lessons

Start here if you have very little background in math fundamentals (or just want to make sure you do). Arithmetic on Khan Academy: So you're ready to have some arithmetic fun? You've come to the ri

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Statistics - Khan Academy 57 lessons

Introduction to statistics. Will eventually cover all of the major topics in a first-year statistics course (not there yet!) Probability and statistics on Khan Academy: We dare you to go through a

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