Unit 01 Air in Potato Chip Bags
Unit 02 Historical Myths
Unit 03 Gift-giving Games
Unit 04 Do You Have Bad Breath?
Unit 05 Making Preserves
Unit 06 Hidden Creatures
Unit 07 A Day in the Life of a Baker
Unit 08 Copying Causes Problems
Unit 09 Traveling Across the Sahara Desert
Unit 10 The Fight over Food
Unit 11 Second Story in Movies
Unit 12 Facts about Sharks
Unit 13 Van Gogh’s Life
Unit 14 What Is a Mutant?
Unit 15 Famous Festivals Around the World
Unit 16 The First Man to Sail Around the World
Unit 17 How Do Insects Communicate?
Unit 18 A Charitable Celebrity
Unit 19 How Does Invisible Ink Work?Unit 20 Peace in Unity