OKAY	=	100 points	presentation was made
SKIP	=	80 points	student declined presentation
NULL	=	60 points	student was absent

Month	Mon	Wed	Fri
January
	03	05	07
	10	12	14
	17	19	21 OKAY
	24	26	28 OKAY
	31
February
		02 NULL	04
	07 NULL	09	11
	14	16	18
	21	23	25
	28
March
		01	03
	06	08	10
	13	15	17
	20 NULL	22	24
	27 SKIP	29 OKAY	31
April
	03	05	07
	10	12	14
	17	19	21
	24	26	28