U.S. Geological Survey (Teachers’ Site)
interactive2.usgs.gov/learningweb/teachers
This is a site of the U.S. Geological Survey—the nation’s largest water, earth, biological science, and civilian mapping agent. It has lesson plans and activities, paper models, and educational materials for K-12 teachers and students. Some subjects include changing world, working with maps, earth hazards, volcanoes, and earthquake effect.