Scope and Sequence 2 Introduction 6 Component Overview 8 Supplementary Resources 10 Unit Tour 12 Teaching with Oxford Discover 24 The Big Question Resources 28 Wrap Up 30 Dictionary Activities 32 Testing Practice 34 Lesson Plans Why do we build bridges and tunnels? Unit 1 36 Unit 2 46 What is the Earth made of? Unit 3 56 Unit 4 66 Why do we wear masks? Unit 5 76 Unit 6 86 Testing Practice 1 96 Why do we like symmetry? Unit 7 98 Unit 8 108 How do we use languages? Unit 9 118 Unit 10 128 Why do we record history? Unit 11 138 Unit 12 148 Testing Practice 2 158 What makes birds special? Unit 13 160 Unit 14 170 What are we afraid of? Unit 15 180 Unit 16 190 Why are stories important? Unit 17 200 Unit 18 210 Testing Practice 3 220 Audio Scripts 222 Workbook Answer Key 229