Working something out to keep the grades up

0
0
09:59
05:00
08:00
07:57
07:30
23:22
19:57
44:07
12:00
10:35
17:25
08:23
29:05
05:01
09:59
04:00
19:57
08:00
10:00
25:47
12:16
10:31
12:52
40:05
07:57
10:22
01:59:56
09:59
14:01
06:46
11:34
29:43
17:35
21:55
13:22
18:43
04:58
10:19
14:09
19:54