www.mathmastery.com/cyberchallenge

www.scienceacademy.com/BI/index.html

http://www.mathplayground.com

http://www.eduplace.com/kids/hme/k_5/proofread/proof.htm

http://www.sheppardsoftware.com/web_games.htm

http://americanhistory.si.edu/onthemove/index.html

http://50states.com/

Search Engines

http://www.wikipedia.org/

http://www.ask.com/

http://www.infoplease.com/

Games

http://www.schooltimegames.com/Logic/Sudoku.html

http://www.schooltimegames.com/Logic/Checkers.html

http://www.schooltimegames.com/Mathematics/ShapeInlay.html

http://www.schooltimegames.com/Logic/Connect_4.html