SCHEDULE D
PERIOD	TIMES	MINUTES
ADV	8:30  -  8:50	20
1ST / 2ND	8:55  -  10:01	66
SNACK	10:01  -  10:18	17
3RD / 4TH	10:23  -  11:29	66
5TH / 6TH	11:34  -  12:40	66
MINIMUM DAY BLOCK