23:56

Revision on proportional in triangle sec.1

20:48

Model 10 prep.1 first term

21:51

Model 1 prep.1 first term

38:12

Final Revision sec.1 part 1

26:18

Differentiation Exam 2

24:39

Differentiation test 8

19:51

Differentiation Exam 7

18:23

Differentiation Exam 4