Primary Sources
Note: not all pages may be available at school

100 milestone Documents (1776-1965) - http://www.ourdocuments.gov/content.php?page=milestone
Access PA Digital Repository - http://www.accesspadigital.org/
Ad Access (advertisements) - http://scriptorium.lib.duke.edu/adaccess/browse.html
American Memory - http://memory.loc.gov/ammem/index.html
Artifact & Analysis - http://www.smithsonianeducation.org/educators/lesson_plans/idealabs/artifacts_analysis.html
Census Statistics - http://www.census.gov/
Charters of Freedom - http://www.archives.gov/national-archives-experience/charters/bill_of_rights_transcript.html
Chronology of US Historical Documents - http://www.law.ou.edu/hist
Civil War newspapers (from Harper's Weekly) - http://www.sonofthesouth.net/leefoundation/the-civil-war.htm
Civil War: Photographs, Manuscripts, and Imprints - http://digitalcollections.smu.edu/cdm4/browse.php?CISOROOT=/civ
Core Documents of US Democracy - http://www.gpoaccess.gov/coredocs.html
Digital Library on American Slavery - http://library.uncg.edu/slavery/
Documents in Early American History - http://clio.missouristate.edu/FTMiller/Docs/docs.htm
Eyewitness to History - http://www.eyewitnesstohistory.com/
Getting Started with Primary Sources in the Classroom http://www.archives.gov/education/research/index.html
Historic Government Documents from WW II - http://digitalcollections.smu.edu/all/cul/hgp/
History and Politics Out Loud (politically significant audio material) - http://www.hpol.org/
History Central: Source Documents - http://www.historycentral.com/Documents/index.html
Inaugural Addresses - http://www.governingdynamo.com/political-galleries/
Library of Congress flickr - http://www.flickr.com/photos/Library_of_Congress/
Library of Congress Geography & Map Reading Room - http://www.loc.gov/rr/geogmap/
Library of Congress Historic American Newspapers - http://chroniclingamerica.loc.gov/
Library of Congress Prints & Photographs Reading Room - http://www.loc.gov/rr/print/
Map Collection (David Rumsey) - http://www.davidrumsey.com/blog/categories/recent-additions
Mexico: Photographs, Manuscripts and Imprints - http://digitalcollections.smu.edu/cdm4/browse.php?CISOROOT=/mex
National Archives - http://www.archives.gov/education/index.html
Nineteenth Century Documents - http://www.furman.edu/~benson/docs/
Old Magazine Articles - http://www.oldmagazinearticles.com/home.php
Our Documents - http://www.ourdocuments.gov/index.php?flash=true&
PA History (from PHMC) - http://www.portal.state.pa.us/portal/server.pt/community/pennsylvania_history/4276
PA's Past (digital bookshelf at Penn State) - https://secureapps.libraries.psu.edu/digitalbookshelf/
Perry-Castaneda Library Map Collection - http://www.lib.utexas.edu/maps/
Repositories of Primary Sources - http://www.uiweb.uidaho.edu/special-collections/Other.Repositories.html
State of the Union Addresses - http://www.asksam.com/ebooks/StateOfTheUnion/
Thomas (legislative information from Library of Congress) - http://thomas.loc.gov/
Time Archive (1923+) - http://www.time.com/time/archive/
Today's document from the National Archives - http://www.archives.gov/historical-docs/todays-doc/
US Congressional Documents and Debates (1774-1875) - http://lcweb2.loc.gov/ammem/amlaw/lawhome.html
US Constitution and Bill of Rights - http://www.digitalhistory.uh.edu/database/subtitles.cfm?TitleID=55
Voices from the Days of Slavery - http://memory.loc.gov/ammem/collections/voices/
World Digital Library (significant primary materials from countries and cultures around the world) - http://www.wdl.org/en/
WWI Document Archive - http://wwi.lib.byu.edu/index.php/Main_Page
WWII Photographs (Frank J. Davis) - http://digitalcollections.smu.edu/cdm4/browse.php?CISOROOT=/fjd
WWII Photographs (Melvin C. Shaffer) - http://digitalcollections.smu.edu/cdm4/browse.php?CISOROOT=/mcs

For more resources, visit http://primarysources.wikispaces.com/