All public, and Catholic, high school games (varsity, junior varsity, freshman): 8 minutes.
Public middle schools: Most 8 minutes; Some 7 minutes.
Catholic middle school seventh grade, and eighth grade, "varsity": 7 minutes.
Catholic middle school fifth grade, and sixth grade, "junior varsity": 6 minutes.
Prep schools (high schools, some with post graduate programs): 16 minute halves.