The Zinn Education Project website has compiled an awesome list of resources for teaching history:

http://zinnedproject.org/teaching-materials/list-of-resources

Resources include nonfiction books, fiction books, articles, audio, movies, websites, teaching guides, and more!

I really appreciate the way these sources are oriented towards a “people’s history” and emphasize teaching history through a lens of social justice. This site is a great place to look for “hooks” that would grab students’ interest at the beginning of a history lesson, or even for books or films that could be central to a teaching unit. Also, you can explore the resources by theme or time period, which is super helpful!