working with many students

2 hours 1 min

18 mins 1 sec

2 hours 38 secs

25 mins 56 secs

2 mins 7 secs

1 min 41 secs

6 mins 42 secs

13 mins 2 secs

1 hour 59 mins 4 secs

1 hour 55 mins 27 secs

1 hour 56 mins 17 secs

1 hour 50 mins 24 secs

4 mins 29 secs

37 secs

16 secs

1 hour 1 min 46 secs

18 secs

13 mins 2 secs

2 hours 8 mins 54 secs

40 mins 36 secs

1 min

7 mins 37 secs

1 hour 8 mins 43 secs

8 mins 19 secs

26 mins 46 secs

1 hour 51 mins 34 secs

1 hour 5 mins 52 secs

40 mins 2 secs

3 mins 1 sec

22 secs

5 mins 1 sec

6 mins 42 secs

1 min 50 secs

22 mins 49 secs

25 mins 48 secs

29 mins 47 secs

1 hour 58 mins 7 secs

5 secs

6 mins 20 secs

2 mins 28 secs