Library of Congress Website is a top notch place to find primary source documents.
Community Review for Library of Congress
I believe using primary sources with research is extremely important. This site is a visual learners dream! You can show change over time and compare documents from the past. This is the largest repository of primary source documents. I have used this more recently because of the great new updated changes, if you used it prior to the last two years you should go back and revisit this site. It has become much more user friendly. You can easily download letters, music files and photographs from the past. Don't miss out on utilizing this valuable resource to enhance your teaching!
How I Use It
I have used this website to create sample tests and assignments. Teachers can utilize the primary source documents to create a multitude of projects when the get on this website such as: test questions, writing prompts and documentation support for research. It has become much more user friendly in the last year. If you go to the education tab at the top "blue" toolbar you will find lesson plans and resources galore.