This site helps students unravel the mystery of irrational numbers. This site was designed for advanced placement classes. The site tests a student's knowledge of pi through an interactive format. This page contains a large collection of material about prime numbers. This site presents a monthly mind teaser.
Students can also submit their own mind teasers.
This site contains many simple and fun activities that can develop enthusiasm for math in younger students. This site presents a new fractal that is generated by Julian C. Sprott. There are also links to other fractal sites. This site presents Buckminster Fuller's creations. The site is very useful for those enrolled in advanced placement math classes.