http://www.yahooligans.com
Excellent search engine that is easy to use and helpful for
locating kid friendly sites.
http://www.funbrain.com
Great educational games for all subject areas.

http://www.pbs.org/kids/
Games and activities based on PBS television shows.
http://go.grolier.com
This site has excellent online encyclopedias and reference resources. The New Book of Knowledge features reference material and current events for grades 3 and up