Historians use primary sources to form and analyze questions about the past. These sources can also be challenging to integrate into middle school and high school social studies classrooms; oftentimes, they include archaic language and require a certain amount of background information to be of any use. As a result, primary sources tend to be relegated to supplementary reading lists in traditional history textbooks. The Stanford History Education Group wants to change that. With the Reading Like a Historian series, the Group has compiled 73 lessons about U.S. history and 37 lessons on world history that center on a diverse collection of primary sources, including letters, maps, photographs, and videos. Each lesson incorporates materials that enable middle and high school students to situate and evaluate historical events and actors, including select primary sources, concise background readings, and graphic organizers. These lessons are carefully scaffolded, highly interactive, and encourage young historians to connect sources from the past with enduring issues that persist in our own time. A Quick View of each lesson is available to all site visitors; those interested in downloading lesson plans, PowerPoint presentations, or original documents will need to create a free account.