Unit 1~5

1 Why we need bones
2 First aid
3 Calculating fractions
4 How smart is yours phone?
5 Violins vs. Violas

Unit 6~10

6 Learning from fossils
7 Coco chanel's famous suits
8 Do something good: vilunteer!
9 Heat transfer
10 The mysterious egyptian pyramids

Unit 11~15

11 Start your trip right
12 Earth-friendly energy
13 The origins of money
14 The Incredible hall of mirrors
15 Math riddles

Unit 16~20

16 Wholesle stores vs. Supermarkets
17 The king of soccer
18 Pick the right lnk
19 Puberty: What to expect
20 Good bacteria and bad bacteria