May 15, 2011
free.ed.gov is a collection of teacher resources organized by subject and resource (animations, primary sources, photos and videos). They also have a what's new section which is great if this is a resource that you continue to use.
Check out Our Documents in the primary document section. It's a page dedicated to teaching with the "100 milestone documents" as a way to teach American history. FedFlix in the videos section is another amazing resource; a collection of videos produced by the federal government covering a huge range of topics.
There are many more I could list here but best to explore for yourself and see what would be best to use in your own classroom.