White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
National Geographic for Kids http://www.nationalgeographic.com/kids/
Fun activities - by girls....for girls. http://www.missoandfriends.com/
It is a site with interactive math activities; has created a toolkit page with links to over 50 explorers, games, and quizzes in which students can tailor their activities. http://www.shodor.org/interactivate/assessments/