http://www.archives.gov/-- This is the site for the National Archives and Records Administration. It provides documents, historic photos, and much more. It also has a section for teachers and has lesson plans and other information to aid teachers in using documents.


http://avalon.law.yale.edu/-- This site is provided by the Yale University law school and contains a vast array of documents in law, history and diplomacy. It is useful to history teachers in the amount and variety of primary documents available for use, either in lessons or to direct students to for research.


http://www.loc.gov/index.html-- The Library of Congress website provides many useful resources, including lesson plans and resources, primary documents, music, films and much more. It also contains links to other resources for use in the classroom.