Here are some great educational games that student can enjoy! (only in their free time though) ;)
http://westward.globalgamenetwork.com/cgi-bin/westwardtrail.pl
http://www.pbs.org/wnet/frontierhouse/game/flash.html
http://westward.globalgamenetwork.com/cgi-bin/westwardtrail.pl
http://www.pbs.org/wnet/frontierhouse/game/flash.html