Here you'll find everything from ANCIENT MATHEMATICS (with links to materials at the Vatican and in the U.S. Library of Congress) to WOMEN MATHEMATICIANS, (biographies written by students at Agnes Scott College).
There are so many good sites, however, that it can take a long time to find just what you're looking for.
We recommend that for general history, chronologies, and biographies of mathematicians, you begin with the searchable MACTUTOR HISTORY OF MATHEMATICS ARCHIVE from St. Andrews, Scotland - don't miss the articles in their History Topics Index:
As math resources on the Internet continue to expand, the Math Forum has added new categories for classifying sites. The full list of MATHEMATICS ON THE INTERNET BY TOPIC - from Arithmetic, Algebra, and Geometry to Ordinary and Partial Differential Equations or Fourier Analysis and Wavelets - with links to exhaustive lists of resources for each topic, can be found at:
THIRD INTERNATIONAL MATHEMATICS AND SCIENCE STUDY (TIMSS)
The goal of this study is to assess school achievement in mathematics and science in nearly 50 countries. Designed to provide a comparative assessment of international educational achievement to date, it studies student outcomes, instructional practices, curricula, and cultural context.
Don't miss The TIMSS Videotape Classroom Study, a video survey of eighth-grade mathematics lessons in Germany, Japan, and the United States:
TIMSS is a project of the National Center for Education Statistics (NCES), the primary federal entity for collecting and analyzing data related to education in the United States and other nations. For comprehensive information consult: