Webster's Dictionary (for Spelling Homework). http://www.Dictionary.com
National Geographic for Kids http://www.nationalgeographic.com/kids/
Fun activities - by girls....for girls. http://www.missoandfriends.com/
NASA for middle-school students http://www.nasa.gov/audience/forstudents/5-8/features/index.html
Webkinz http://www.webkinz.com
Fun Brain Activities http://www.funbrain.com