Ann Arbor Public Schools (AAPS) serves the city of Ann Arbor, Michigan and parts of eight surrounding townships covering 125 square miles (320 km2). The district operates 20 elementary schools, 2 K-8 schools, 6 middle schools, 4 comprehensive high schools, 1 alternative high school, 3 preschools and 1 adult education program; the district maintains 640 acres (2.6 km2) of real estate and 3,300,000 square feet (310,000 m2) of building space. The Ann Arbor Public Schools is the 8th largest school district among 555 districts in Michigan. The district is one of the best in Michigan, and it has a statewide reputation for academic excellence.