Here’s a collection of links that maybe useful for teaching or self-learning mathematics:
- Tim Gowers wrote a series of articles addressed at new Cambridge Part III students. It includes a nice set of posts on basic mathematical logic, among other things.
- Terry Tao produced some multiple-choice quizzes testing basic concepts in mathematics (especially analysis and linear algebra); a version using PBWiki is available. It is not bad for gauging one’s understanding of concepts (for example, see the one on Lebesgue measurable sets on the real line).