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I have a non-mathematician friend who is interested in re-learning algebra. I am more than happy to help, but I am in no position to judge what is a good introductory text --- only to identify when a text is a very bad one.

My friend is interested in starting from "basics" --- he's comfortable with order-of-operations, minus-times-minus-is-plus, and positive integer exponents. He's shaky with negative exponents, logarithms, and roots.

Any recommendations for good, freely-available resources?

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people love to recommend, but I have no experience with it. – BBischof Aug 18 '10 at 19:17
I assume you mean the version that isn't called "abstract algebra" and is about groups and such (Lang's book is about that) For self-study I'd suggest you take a look at the Schaum's series about algebra, they are cheap, full of examples and exercises. – Jonas Teuwen Aug 18 '10 at 23:55
I don't understand, I always thought Lang is a great book - that is what I used myself. – anon Aug 19 '10 at 3:46
@muad: The question was about highschool algebra. – user126 Aug 19 '10 at 15:45
Oops! I was thinking of Algebra By Saunders Mac Lane, Garrett Birkhoff. Don't know why I confused that with Lang! – anon Aug 20 '10 at 7:17
up vote 2 down vote accepted

Khan Academy offers dozens of videos on particular Algebra topics, among thousands of videos on other academic topics.

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Curriki is supposed to be a good resource for this kind of stuff, but I haven't tried it out myself.

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There's a pretty good video course on YouTube EDU, "College Algebra"

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