NASA for middle-school students http://www.nasa.gov/audience/forstudents/5-8/features/index.html
National Geographic for Kids http://www.nationalgeographic.com/kids/
Fun activities - by girls....for girls. http://www.missoandfriends.com/
Prentice Hall - Our Science Series http://www.phschool.com
Harcourt - Our Reading Series http://www.harcourtschool.com
http://www.glencoe.com/sec/science/activities/weather/index.html