Colonial Williamsburg Foundation
Discovering the Past/ an Introduction to Archaeology
This is a good, solid, but concise introduction to what archaeology is, how a site is set up, what one uses artifacts for, and how to approach a site. It is written for the teacher's newsletter from Colonial Williamsburg.
Lin and Don Donn
Lin and Don Donn: Archaeology
This site provides links to lesson plans ranging chronologically from prehistory through the medieval period. Lessons are oriented toward a younger audience with an emphasis on exploration and discovery.