Any good resources to learn advanced math online?

[Destructionator XV]

I got near perfect scores in Calc I,II, and III and also matrix algebra before I dropped out of college, and especially reading Surlethe's and Korenoko's posts, I longing to expand my knowledge of mathematics.

Do any of you know of any good resources online which I can use to continue to build on my foundation of math? reviewers of calculus and linear algebra may be helpful, but what I really want is something to move ahead.

[Surlethe]

I got near perfect scores in Calc I,II, and III and also matrix algebra before I dropped out of college, and especially reading Surlethe's and Korenoko's posts, I longing to expand my knowledge of mathematics.

Glad to know I've influenced someone.

Do any of you know of any good resources online which I can use to continue to build on my foundation of math? reviewers of calculus and linear algebra may be helpful, but what I really want is something to move ahead.

IMHO, nothing beats a good, well-written textbook; however, if you're set on educating yourself online, Wikipedia tends to have good, thorough, if brief, math stuff, and I also use http://mathworld.wolfram.com/ for research into concepts. I do most of my self-educating with textbooks from the local college library, though.