The sites below are for English Language Arts and Math. Have Fun!!!
http://www.mrsgoldsclass.com/LanguageArts.htm
http://www.gamequarium.com/languagearts.htm
http://www.internet4classrooms.com/skills-4th-langbuilders.htm
http://www.internet4classrooms.com/skills-4th-mathbuilders.htm
http://www.mathplayground.com/
http://www.playkidsgames.com/mathGames.htm
http://www.onlinemathlearning.com/math-games.html
http://coolmath4kids.com/
http://www.ixl.com/
Singular and Plural Homework game site