The following books and websites contain additional information, activities, and enrichment options. The books may be available through publishers, distributors such as bookstores or online retailers, or library systems.

For Students

Rod Theodorou, Heinemann, 1999
Rod Theodorou, Heinemann, 1999
Horseshoe Crabs and Shorebirds: The Story of a Food Web
Victoria Crenson, Cavendish, 2003
Debby Atwell, Houghton Mifflin, 2004

For Teachers

Biology of Amphibians
William E. Duellman and Linda Trueb, The Johns Hopkins University Press, 1994


Sea Grant Ocean Sciences Education Center
All About Turtles

For additional websites, see the Best of the Net feature at and sites recommended by the National Science Teachers Association at