Environmental issues
http://www.epa.gov/students

GIS
http://www.nationalatlas.gov

News Links
http://www.abyznewslinks.com
(newspapers around the world)

Digital History
http://www.digitalhistory.uh.edu

US Archives
http://www.archives.gov

America's Library (digital)
http://www.americaslibrary.gov

Digital Resources of the Western World
http://eudocs.lib.byu.edu

British Library
http://www.bl.uk

Maps
http://geography.about.com/od/findmaps/Maps.htm

Ancient History resources
http://members.aol.com/donnandlee/index.html

Library of Congress
http://www.loc.gov

History/Social Studies Web Site for K-12 Teachers
http://k-12historysocialstudies.com/boals.html
(comprehensive resources)