science_grade4

11:16

22:00

6:08

6:15

53:46

11:40

6:40

15:35

21:54

14:31

13:30

31:44

29:50

8:42

31:39

10:54

14:47

3:15

31:50

5:17

1:58:48

3:10

6:04

8:26

21:51

8:12

9:50

2:53

12:58

20:39

18:43

1:31

7:11

7:06

9:15

26:50

22:27

11:42

16:17

5:18

9:23

6:10

19:53

25:54

9:07

3:54

10:14

12:46

33:38

29:16

14:47

5:44

2:15

12:19

29:30

16:56

12:33

17:54

4:11

13:27