http://www.playkidsgames.com/
http://www.learn4good.com/games/index.htm
http://funschool.kaboose.com/
http://nobelprize.org/educational_games/
http://www.sheppardsoftware.com/web_games_menu.htm
http://www.eduplace.com/edugames.html
http://www.dimenxian.com/