CHAPTER 01
UNIT 01 Underwater Explorers
UNIT 02 ID? My Ear
UNIT 03 a2+b2=c2
UNIT 04 A Royal Library
THINK & WRITE 1 What Are Some Benefits of Using a Library?

CHAPTER 02
UNIT 05 How to Get People on Your Side
UNIT 06 How Glaciers Change the Land
UNIT 07 Art in Everyday Life
UNIT 08 Get a Good Night’s Sleep
THINK & WRITE 2 What Can We Do for Our Health Every Day?

CHAPTER 03
UNIT 09 New Ways to See Art
UNIT 10 The Farms of the Future
UNIT 11 For Only Good Dreams
UNIT 12 The Ozone Layer Saves Itself?
THINK & WRITE 3 How Can We Help Save the Earth?

CHAPTER 04
UNIT 13 The Secrets of Stars
UNIT 14 The Other Stonehenges
UNIT 15 Music in Famous Paintings
UNIT 16 Helper or Bystander?
THINK & WRITE 4 Why Do Many Students Not Volunteer?

CHAPTER 05
UNIT 17 Basic Geometry
UNIT 18 The Imjin War
UNIT 19 Forests by the Shore
UNIT 20 Is Early Childhood Education Effective?
THINK & WRITE 5 How Can We Improve Our English?

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