The U.S. Geological Survey (USGS) offers a wide variety of materials such as teacher packets, fact sheets, posters, booklets, maps, publications, and websites useful for teaching earth and biological science. "Educational Materials from the U.S. Geological Survey" lists items intended specifically for the classroom. This list is document number 2301. The Learning Web is part of USGS's education site which provides teachers' packets and activities targeted for K-12.

The U.S. Geological Survey
Earth Science Information Center
National Center
Reston, VA 20192
Telephone 1-800-USA-MAPS
Web:  www.usgs.gov/education/