The Alaska High School Activities Association was founded in 1957 by the territorial board of education, when the need arose for a regulating body in local and regional basketball tournaments. By 1973, separate regions were formed for basketball competition. By 1987, ASAA became fully independent from state government control or oversight. Currently, ASAA serves as the organizing body for over 190 schools, with a combined enrollment of over 35,000 students.
You can find out more about how the schools are classified at http://en.wikipedia.org/wiki/Alaska_School_Activities_Association