"Free lesson plans written by teachers for teachers. Like you. Classroom Resources has hundreds of original lesson plans for elementary, middle, and high school students. Borrow them as-is or use them to spark your own lesson plans."
Smithsonian lesson plans emphasize inquiry-based learning using primary sources and museum collections. Each plan is print-friendly and provides you with all the materials you need—photographs, reproductions, handouts, activities, suggested strategies, standards information, and additional online resources.