“You Be the Historian” is an interactive online exhibit presented by the Hands-on History Room of the National Museum of American History. Elementary and middle-grade students are asked to figure out what life was like 200 years ago for a family in New Castle, Del., by examining such artifacts as a flail and sickle, a mortar and pestle, tax records, and a will. Students are then asked to consider what future historians might learn about people today by examining objects in the students’ own homes. The site includes suggestions for how teachers might use the activity in the classroom.