Math and science videos from TIMSS (you will have to create an account).
This blog post explains how to use the PBS Nova program on the quest to produce absolute zero.
Science for Kids - this site offers science news written for young readers. Updates on new discoveries. Games.
Kids Health. [science health]
Classrooms of the 21st Century - probeware in the biology classroom. Hosted by Masterman and Goodman
Online games involving principles of physics.
Flash-based demonstrations of geological concepts.
Polar Discovery is a resource related to the environment of the earth's polar regions. This site would be useful in connection with present concerns regarding climate change.
Short comments on science from Scientific American