http://www.bbc.co.uk/schools/typing/ (this is a keyboarding/typing program)
http://www.20q.net/ 20 Questions game...very cool!
http://www.spellingcity.com/ (Spelling game)
http://www.coolmath-games.com/ (GREAT GREAT MATH GAMES!!)
http://www.bbc.co.uk/schools/scienceclips/index_flash.shtml (Science clips but would be great reading practice)
http://www.gamequarium.com/ (Just like Readquarium but has all sort of skill games for diff. subjects)
http://www.primarygames.com/ (FUN GAMES! all subjects)
http://www.weeklyreader.com/ Digital editions of weekly readers but have to be signed in.
http://www.prongo.com/games/ games for different subjects
http://funschool.kaboose.com/index.html all subjects
http://www.seussville.com/university/ Seussville University
http://kidsplanet.org/ All about animals, wildlife, and endangered species....would be good reading practice too!