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/
Edhelper.com- This page is very useful for creating worksheets for your kids to work on for extra practice. http://www.edhelper.com
Triple A Math, great way to practice math problems such as multiplication and division. http://www.aaamath.com/
Science News for Kids http://www.sciencenewsforkids.org/