Teacher and student

17 mins 11 secs

6 mins 22 secs

19 mins 45 secs

13 mins 47 secs

14 mins 18 secs

1 min 54 secs

22 mins 49 secs

13 mins 11 secs

18 mins 3 secs

16 mins 45 secs

18 mins 52 secs

21 mins 23 secs

30 mins 18 secs

26 mins 37 secs

20 mins 6 secs

19 mins 36 secs

31 mins 13 secs

13 mins 17 secs

29 mins 5 secs

25 mins 17 secs

22 mins 30 secs

25 mins 28 secs

24 mins 8 secs

20 mins 25 secs

10 mins 1 sec

37 mins 4 secs

19 mins 25 secs

17 mins 3 secs

8 mins

11 mins 47 secs

8 mins

1 hour 33 mins 4 secs

13 mins 36 secs

20 mins 41 secs

17 mins 52 secs

38 mins 51 secs

22 mins 59 secs

16 mins 58 secs

34 mins 16 secs

22 mins 43 secs