Located approximately 40 miles north of Anchorage, Colony High School is one of three comprehensive large high schools (schools serving 900-1,300 students) in the Mat-Su Valley and is situated between the cities of Palmer and Wasilla, less than seven miles from each. It is the newest building of the three, having first opened its doors to students in 1991 with only 375 freshmen and sophomores in a school designed for a capacity of 1,200. The first graduating class was the Class of 1994. Colony High School holds the highest Alaska School Performance Index score in the state for all 4A high schools in 2013. The ASPI score is based on state-mandated proficiency tests in reading, writing, and mathematics in addition to SAT/ACT scores, WorkKeys scores, and graduation rates. CHS is fully accredited through AdvancEd/NWAC. Because of its high expectations and a rigorous but broad academic program, Colony High School has among the highest test scores (HSGQE/SAT/ACT) in the state of Alaska. Fourteen Advanced Placement (AP) courses are offered in every subject area including AP Literature; AP Language; AP World, US, and Government; AP Biology; AP Chemistry; AP Physics; AP Environmental Science; AP Calculus (both AB/BC); AP Statistics; AP Art Studio; AP Music Theory, and more.