Teacher to student,student to teacher

3 mins 14 secs

20 mins 5 secs

10 mins 20 secs

1 min 17 secs

51 mins 26 secs

29 mins 3 secs

56 secs

6 mins 9 secs

6 mins 25 secs

6 mins 25 secs

21 mins 48 secs

7 mins 7 secs

22 mins 10 secs

6 mins 25 secs

5 mins 4 secs

6 mins 51 secs

6 mins 16 secs

6 mins 15 secs

5 mins 32 secs

5 mins

6 mins

25 secs

11 mins 9 secs

6 mins 15 secs

2 mins 40 secs

6 mins 11 secs

10 mins 32 secs

26 mins 18 secs

6 mins 11 secs

6 mins 15 secs

6 mins 15 secs

12 mins 25 secs

8 mins 1 sec

13 mins 23 secs

5 mins 17 secs

9 mins 50 secs

14 mins 32 secs

6 mins 11 secs

8 mins 1 sec

9 mins 11 secs