Describes a 4-week multidisciplinary unit built around intensive study of a historical period, used in grades 3-5 at Pepperell Intermediate Schools, in Opelika, Alabama. Students experience U.S. history at a five-day fair where periods on history have been recreated. Describes planning for American Heritage Week, the Village Fair, and field trips. Emphasizes that student involvement is key to learning. (NL)