High Quality Content by WIKIPEDIA articles! 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 over 16,000 students. Amphi was established on July 3, 1893, and presently serves segments of North Tucson (an area that is known as Amphitheater), Casas Adobes, Catalina Foothills, and the communities of Oro Valley, eastern Tortolita, and Catalina northwest of the city.