Teacher-created units/lessons that make use of primary sources from the LOC: some explicitly literature/arts focused, and many that deal with informational texts for LA/SS classrooms.
Reader's advisory compilations for a younger audience. Includes descriptions of fiction and non-fiction books, read-alikes, book discussion guides, award lists, and recommended reading lists.
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.
A wide array of potential lessons and other teaching resources, with spotlights on lesson materials that tie in with current events. (Many resources restricted to NCSS members.)
Free portal "created by the National Science Foundation to provide organized access to high quality resources and tools that support innovations in teaching and learning at all levels of science, technology, engineering, and mathematics education."