Amphitheater Public Schools, also known as Amphi or District 10, is the third largest public school district in Tucson, Arizona, in terms of enrollment, with about 13,500 students and a staff of about 2000 employees Amphi was established on July 3, 1893. With its headquarters in Flowing Wells, presently serves segments of North Tucson, Casas Adobes, Catalina Foothills, and the communities of Oro Valley, eastern Tortolita, and Catalina northwest of the city.