Language Arts
http://pbskids.org/arthur/games/poetry/
http://www.hubbardscupboard.org/printable_booklets.html
http://www.bigiqkids.com/SpellingVocabulary/Main/SpellingVocabularyMain.html
Math
http://www.bbc.co.uk/bitesize/ks2/maths/shape_space/shapes/play/
http://www.aplusmath.com/flashcards/index.html
http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/fractions/
http://nces.ed.gov/nceskids/createagraph/default.aspx
Science
http://www.edheads.org/activities/simple-machines/index.shtml