Americans Who Tell the Truth http://www.americanswhotellthetruth.org/
BrainPop Free Stuff http://www.brainpop.com/free_stuff/
Do Something https://www.dosomething.org/
I Civics https://www.icivics.org/games
Internet Archive: California Light and Sound Collection https://archive.org/details/californialightandsound
Internet Archive: Cultural & Academic Films https://archive.org/details/culturalandacademicfilms
National Archives: http://docsteach.org/activities
National Archives: Research Our Records http://www.archives.gov/research/
Small Talks http://www.small-talks.co.uk/
Smithsonian Collections http://www.si.edu/Collections
Timetoast http://www.timetoast.com/
University of California: Calisphere http://www.calisphere.universityofcalifornia.edu/
The Virtual Museum of the City of San Francisco http://www.sfmuseum.org/
Zinn Education Project http://zinnedproject.org/
ArtsEd4All 