National Geographic Kids http://www.nationalgeographic.com/kids/
NASA Kids http://www.nasa.gov/audience/forkids/home/
Starfall Reading -- Interactive stories and games http://www.startfall.com
Funschool -- Interactive computer games for many content areas http://games.funschool.com/games.php?level=4
Brainpop -- Movie clips that answer science and math questions http://www.brainpop.com/
Math Magician Games -- Addition, subtraction, multiplication, and division games http://www.oswego.org/ocsd-web/games/Mathmagician/cathymath.html
Math Dictionary -- Explains over 500 mathematical terms http://www.amathsdictionaryforkids.com/
Invention at Play -- Games that allow students to build, create, make-believe, and problem solve http://www.inventionatplay.org/playhouse_main.html
Math Fact Practice http://www.meganova.com/megakids/flash.htm
Giggle Poetry -- Learn to Read and Write Poetry http://www.gigglepoetry.com/