Third Grade Skills including Reading, Language Arts, Math and more! http://www.internet4classrooms.com/skills_3rd_original.htm
National Geographic for Kids http://www.nationalgeographic.com/kids/
Fun, interactive science website http://www.edheads.org/
Fun games http://www.funbrain.com/
All sorts of fun activities! Everything from writing poems to practicing vocabulary http://www.readwritethink.org/student_mat/index.asp