Oak Forest	76	76	70
Oaktown	80	75	70
Oak Lawn	56	60	70
Oak Park	43	52	60
Oakbrook	45	58	60
Oakmill Creek	75	88	85
Oakwood Hills	75	88	85
O'hare	x	55	60
Olympia Fields	90	80	85
Ontarioville	49	58	70
Orland Park	70	60	75
Oswego	85	85	90