Clean the classroom

9 mins 50 secs

7 mins 59 secs

7 mins 59 secs

7 mins 59 secs

8 mins 4 secs

12 mins 41 secs

4 mins 57 secs

7 mins 50 secs

8 mins 16 secs

12 mins 24 secs

45 secs

5 mins

5 mins

7 mins

5 mins 1 sec

2 hours 24 secs

42 mins 8 secs

18 mins 50 secs

5 mins 21 secs

29 mins 52 secs

31 mins 28 secs

52 mins 19 secs

12 mins

3 mins 22 secs

16 mins 36 secs

9 mins 12 secs

9 mins 28 secs

7 mins 34 secs

1 min 5 secs

2 hours 8 mins 48 secs

1 hour 58 mins 14 secs

2 mins 28 secs

31 mins 29 secs

10 mins 43 secs

1 hour 54 secs

5 mins 10 secs

10 mins 9 secs

2 hours 12 mins 45 secs

30 mins 6 secs

2 hours 19 mins 11 secs