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/
Ask a question http://www.askjeeves.com
Periodic Table http://www.webelements.com
ChemBalancer/Practice balancing formulas http://www.chembalancer.com
TAKS Turorial file:///private/var/tmp/folders.501/TemporaryItems/fcctemp/TAKS%20Review%202.webarchive
Interaction of the Body Systems http://faculty.washington.edu/chudler/organ.html
Interaction of the Body Systems http://www.factmonster.com/ipka/A0774536.html