This is a place where students (or you) could go to get online help in math 24/7. While idealistically your students wouldn't need to use this, because it is impossible for you to make yourself available to your students all the time, this is a place where they can go to get help. In addition, this is a good place for teachers to go for ideas on how to teach certain subjects
My friend showed me this a little while ago and I thought it was really neat. Perhaps when your teacher, you can show this to your students as a reward for good behavior
This is a free graphing program that I found online. I find it particularly useful for our CI 401 class, but plan on using in the future with my own students as well.
This website is designed to support teachers and help turn them into better mathematical educators. This website does this by explaining different mathematical content through mathematical investigation that is supported by technology. It also gives many examples of recommended problems for you to try in your class.