This site was made by Q.T. during May 2009 for the purpose of informing students about educational game websites. I hope you enjoy playing games with these sites!
http://www.sheppardsoftware.com/ k-8 variety of educational games
http://www.theproblemsite.com/default.asp k-8 variety of educational games
http://www.funbrain.com/ k-8 variety of educational games
http://www.nabiscoworld.com/Games/game_large.aspx?gameid=10038
k-8 you play chess two computer play multiplayer, one computer play one player.
http://www.theapplegallery.com/Chess/chess.html
k-8 you play chess just multiplayer