Check out these interesting websites.
http://www.mc.maricopa.edu/dept/d10/asb/ (The MCC Anthropology Department homepage, with lots of good links, created and maintained by Dr. Rick Effland.)
http://www.archaeologychannel.org (Several interesting streaming videos about archaeology.)
http://www.pbs.org/race/000_General/000_00-Home.htm (PBS's on-line companion to the documentary "Race: The Power of an Illusion". Check out especially the exercise "Can you tell somebody's race by looking at them?" at http://www.pbs.org/race/002_SortingPeople/002_00-home.htm ).
http://www.crimelibrary.com/ (Court TV's website with lots of true crime stories for fascinating reading.)
http://www.epa.gov/climatechange/index.html (The science of climate change, from the U.S. Environmental Protection Agency, and how you can help protect the environment.)