Access thousands of primary sources — letters, photographs, speeches, posters, maps, videos, and other document types — spanning the course of American history. We're always adding more! Borrow from an ever-expanding collection of document-based activities created by the National Archives, and teachers around the world. Copy and modify activities for your students. Create your own activities using the online tools. It’s as simple as: (1) selecting a tool, (2) choosing your primary sources, and (3) customizing instructions.