0
classroom
2
4
1
0
0
0
0
10:00
0
10:00
1
7
2
05:00
2
07:00
0
27:00
21
05:00
0
00:53
3
12:00
3
4
4
5
5
28:00
5
1
9
4
4
07:00
18
13:00
8
05:00
15
05:00
19
08:00
65