Here are some websites for you to use. Some of them may need a membership to play.
http://www.starfall.com/
http://www.funbrain.com/
http://www.spellingcity.com/
http://www.learningplanet.com/
http://www.mathfactcafe.com/
http://www.multiplication.com/
http://www.seussville.com/
http://kids.nationalgeographic.com/kids/
http://www.ixl.com/
www.abcya.com
http://www.starfall.com/
http://www.funbrain.com/
http://www.spellingcity.com/
http://www.learningplanet.com/
http://www.mathfactcafe.com/
http://www.multiplication.com/
http://www.seussville.com/
http://kids.nationalgeographic.com/kids/
http://www.ixl.com/
www.abcya.com