Some External Links
Here's some mathematics stuff that I've found useful and/or interesting. It's only a small sampling of the range that's out there.
Lecture Notes
A nice set of lecture notes on the entire calculus sequence - for free! The lecturer (Paul Dawkins of Lamar University, Texas), has made his lecture notes available for Calculus, College Algebra, and more. Read the copyright notice and make sure you use them according to it (for example, don't start selling them!).
Calculus Review Materials
Stewart has a short algebra review for those doing calculus.
Here's a short trig review.
General Math Links
Wikipedia is not a bad place to start for math definitions.
Mathworld has loads of stuff.
If you want to get an outline of mathematics research areas, try this Atlas.
My own demos
I'm experimenting with multimedia formats at the moment. Here's some examples (more coming later). What do you think? Would these type of approaches help you? Have you any expertise yourself to share?
If you have feedback and ideas, let me know!
Audio examples:
Video Examples: