tfetp teaching demo

13:27

8:36

1:12:48

53:07

57:39

32:57

1:19:33

13:03

16:19

13:45

12:31

4:04

33:11

46:15

1:15:31

29:36

8:36

3:44

5:10

4:17

2:25

5:32

4:11

3:23

6:47

9:31

4:14

5:30

1:24:58

5:01

5:30

6:37

8:19

8:47

16:06

2:14:57

2:53

17:42

6:20

24:14