Can you ever have too many primary sources?
The answer is . . . no.
There is always room for Jello. You can’t ever eat just one. And you can never have too many primary sources.
I spent the day working with a group of K-12 social studies teachers; took part in some great conversations and overheard others. Among other things, the group is working to create high-quality document based learning activities. They are using Document Based Questions as one of their forms of both formative and summative assessments.
I really like the idea of having kids mess around with documents and try to make sense of them. Obviously there is an art and science to writing a high-quality DBQ.
But one of the problems is finding high-quality primary sources.
So together we started to put together a short list of sites that can provide a variety of resources, activities and teaching materials. I’ve talked about NARA’s DIgital Vaults and Historical Thinking Matters. But thought you might be interested in some of the others they found:
- Historical Scene Investigation
- Footnote
- National History Education Clearinghouse
- Primary Access
- Eyewitness to History
- Perseus Digital Library
- Making Sense of Evidence
- The Object of History
- Ancient History Web SItes
- Digital History
- Social Studies Central
Enjoy!
History Tech 
Thanks, Glenn! This will be helpful for a lot of teachers out there!
Some additional favorites:
The Authentic History Center http://www.authentichistory.com/
By far, my favorite site for not only primary text, but also songs and other artifacts.
List compiled by Eduplace, dealing with American History and World History: http://www.eduplace.com/ss/hmss/primary.html
American Memory from the Library of Congress http://memory.loc.gov/ammem/index.html
Avalon Project http://www.yale.edu/lawweb/avalon/avalon.htm
EuroDocs http://eudocs.lib.byu.edu/index.php/Main_Page
Making of America http://quod.lib.umich.edu/m/moagrp/ (although this one is tougher to use)