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Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane


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Projectile motion, mechanics and electricity and magnetism. Solid understanding of algebra and a basic understanding of trigonometry necessary.


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Videos on geometry. Basic understanding of Algebra I necessary. After this, you'll be ready for Trigonometry. Geometry on Khan Academy: We are surrounded by space. And that space contains lots of t


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In this series of physics lectures, Professor J.J. Binney explains how probabilities are obtained from quantum amplitudes, why they give rise to quantum interference, the concept of a complete set of


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Preview the new Windows 10: Learn about all the reasons you'll love the new Windows 10 - available as a free upgrade on July 29th. It's familiar, comes with exciting new innovations like Cortana and t




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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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