 High school-level quiz bowl is occasionally played over an extended period of time by schools within an area or preexisting athletic conference or even in single matches against other schools.Some regional variants organized for grade school students include Knowledge Bowl, Ohio Academic Competition (OAC), Florida's Commissioner's Academic Challenge (CAC), and various television quiz competitions such as "It's Academic".Athletic and activities associations in some US states also organize quiz bowl competitions, including Missouri's MSHSAA, Illinois's IHSA, Kansas's KSHSAA, and Virginia's VHSL.