Grade 3 Math: This site has math practice activities.
http://www.eduplace.com/kids/mw/g_3.html
Eduplace: This site has great activities and games.
Funbrain: This site has great activities and games.
Learning Planet: This site has language arts practice.
http://www.learningplanet.com/act/rats/ratslist2.asp
Fun School: This site has Language Arts, Reading, Math, Social Studies, and Science games.
http://funschool.kaboose.com/arcade/index.html?trnstl+1
Storyline: Listen to people read you stories.
http://www.storylineonline.net/