In general, remember that adding the phrase (in quotes) "study and teaching" to any topic will generally help you narrow down on materials intended for use by PK-12 teachers. Another way of narrowing your search is to choose JFK Lower Level Curriculum Center from the list of Physical Locations in the catalog's left sidebar, since that will limit your search to materials set aside for use either by teachers or students in a PK-12 classroom.
Search for books, videos, articles and more at EWU Libraries, Summit Libraries and beyond. While not required, if you want the full functionality (save or request items, etc.), please sign in with your NetID.
Finding lesson/unit ideas in ERIC
Remember that ERIC documents often have curricular ideas that can be built on or adapted: don't click peer-reviewed to ensure you see all the types of materials collected in ERIC!
A wide array of documents, including photos, maps, and audio/video clips, from the National Archives -- another good source for American history. Docs Teach also supplies educators with activities designed around one or more selected documents, for use in the classroom.
A project of the National Center for History in the Schools at UCLA & SDSU: a wide array of types of units and lessons that collectively cover the whole breadth of human history in an integrative approach.
Links to a wide variety of lesson plans at TeachingHistory.org -- the national history education clearinghouse. They have lessons on other topics, as well, if you're not looking for something with primary sources.