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/
Science News for Kids http://www.sciencenewsforkids.org/
Test Toob: A community for everyday scientists! Post or watch videos of experiments and other science stuff! http://www.testtoob.com/
Alternative Energy http://alternativeenergy.com/notes/GreenCity
Earth History http://www.earth-time.org/
This Dynamic Planet World Map of Volcanoes, Earthquakes, Impact Craters, and Plate Tectonics http://www.minerals.si.edu/tdpmap/
Creating Graphs http://nces.ed.gov/nceskids/createagraph/default.aspx
Discovery Volcano Explorer - Virtual Volcano Build a Volcano (we did this in class!) http://dsc.discovery.com/convergence/pompeii/interactive/interactive.html