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/
Houghton Mifflin http://www.eduplace.com
Funbrain contains games in math, reading, and other areas. http:/www.funbrain.com
Harcourt has activites that are related to science. http:/www.harcourtschool.com