footagefarm - YouTube
Too many primary source videos to list, but a worthwhile visit if you have the time to find raw footage to accompany any 20th century US History lesson
Minnesota Vikings Stadium: A Summary of Actions by 2012 Legislature
The new Minnesota Vikings stadium cost more than NASA's mission to Pluto. It the place of business of a private corporation, carrying the name of another corporation "US Bank Stadium" yet half of its funding was paid by Minnesota taxpayers. This is a summary of the state legislation authorizing this funding - it is a primary source. Put the charts in front of students and let them ask questions - perfect start to an inquiry lesson on capitalism. Or rather the economic system that we try to describe with that word
Diary and Appointment Book of Harry S. Truman