The Math Archives - A searchable archive of math teaching materials, software, and WWW links. The Official NASA Homepage - NASA information, history, pictures, and a lot more. Mars Pathfinder - See what the Mars Pathfinder has been doing. The Dr. Carl Sagan Honorary Site Riddler - Game site that is totally free. Riddles, trivia, crosswords, internet games, and more.
Real prizes are up for grabs.
Kathy Schrock's Guide to Educators -Math links to explore. Yahooligans - A web guide for kids. Sandlot Science - An interactive guide to optical illusions on the internet. Explore hands-on demonstrations, artwork, animations, projects, games and puzzles. You can participate by running a free program that downloads and analyzes radio telescope data.