Ask HN: My math foundation is weak, can HN recommend useful math resources?

are there any articles, books, papers, documentaries, or other resources about interesting math or mathematical phenomenon that you guys would recommend?

A book list I posted in answer to a similar question a while ago:

http://news.ycombinator.com/item?id=497796

And another list:

http://news.ycombinator.com/item?id=755416

Books and links to articles:

http://news.ycombinator.com/item?id=2862115

Project Euler offers an interesting set of challenges.

http://projecteuler.net/

Khan Academy (khanacademy.org) definitely!

Try going through the videos and exercises of the MIT OCW materials.

Khan Academy FTW

With math, the one thing that works best is practice. Get some high-school math books and start solving problems. Solve all of them, then get yourself another textbook and solve the problems there.

"ocw scholar" at MIT. Start with calculus, then do linear algebra. By the time you're done, they'll have their DE course refactored for independent learning too.

Try PatrickJMT