math

For kids, but parents (and teachers) are welcome, too. Animated movies and quizzes on social studies, English usage, science, technology, and lots more. You'll find just about everything covered, from anthrax to subject-verb agreement.

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, ...Infoplease is the world's largest free reference site. Encyclopedia, Dictionary, Almanacs, and Homework Help on English, math, history, geography, science, ...

If you're not doing too well at school, or just like math and want to keep your mind fresh and exercised, this is the website for you. It offers a large selection of math topics and exercises for students of any level, calculators, and even math games.

It is what the name implies - a ton of information and facts. Designed and geared toward kids, but as an adult, I could spend some serious time playing around this site. The information isn't "dumbed down" for kids; it is really well written and explained.