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Khan Academy

http://www.khanacademy.org/ Matrices, vectors, vector spaces, transformations. Covers all topics in a first year college linear algebra course. This is an advanced course normally taken by science or engineering majors after taking at least two semesters of calculus (although calculus really isn't a prereq) so don't confuse this with regular high school algebra.
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ebooks

http://www.ehow.com/

eHow.com

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