NASA for middle-school studentshttp://www.nasa.gov/audience/forstudents/5-8/features/index.html
National Geographic for Kidshttp://www.nationalgeographic.com/kids/
Up-to-the-minute Seismic Activity Around the Worldhttp://www.iris.edu/seismon/
Roller Coaster Physicshttp://www.funderstanding.com/k12/coaster/
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