Teacher and student

30 secs

32 mins 11 secs

2 mins 49 secs

3 mins 38 secs

14 secs

2 mins 56 secs

5 mins 52 secs

13 mins 22 secs

2 mins 6 secs

51 secs

38 secs

48 secs

5 mins 32 secs

31 secs

15 mins 51 secs

27 mins 13 secs

30 secs

1 min 47 secs

1 hour 2 mins 58 secs

8 mins

5 mins 13 secs

45 secs

13 mins 15 secs

1 min 12 secs

7 mins 57 secs

13 mins 23 secs

7 mins 1 sec

5 mins

1 min 9 secs

8 mins 53 secs

29 secs

3 mins 35 secs

3 mins 1 sec

2 mins 18 secs

18 mins 22 secs

5 mins 46 secs

3 mins

45 secs

16 mins 26 secs

2 mins 42 secs