Teaching with Historic Places from the National Park Service has developed more than 160 classroom-ready lesson plans that together range across American history. You can also view the entire collection according to location, topic, primary source, skill, U.S. History Standards, and Social Studies Standards.
Image credit: Image credit: Rosskam, Edwin, photographer. El Morro, the historic Spanish fort from the sea. San Juan, Puerto Rico. Jan. Photograph. Library of Congress