A searchable catalog of a bunch of scientists and mathematicians of the 16th and 17th centuries, when a lot of math was discovered. The ultimate history of mathematics page, in my opinion. Women Mathematicians Bios and pictures of women who have influenced mathematics - from Hypatia to the present. A good resource about the history of the abacus, plus how to do basic computation. A hilariously funny look at numbers.
Students can explore different situations in geometry right on their computers.
Again, be sure to have the latest version of Netscape for this site to work. Kathy Schrock's Guide for Educators - Mathematics Lots of links for mathematics. Every teacher should visit here. The Math Forum Resources, discussions, research, problems of the week, etc, for teachers of any level. All kinds of links to lessons, activities, and other fun math sites.