Unit 1 Which is bigger? Lesson 1 Lesson 3 Lesson 5 Lesson 2 Lesson 4 Lesson 6 Unit 2 What are you going to do? Lesson 7 Lesson 9 Lesson 11 Lesson 8 Lesson 10 Lesson 12 Unit 3 English in your life Lesson 13 Lesson 15 Lesson 17 Lesson 14 Lesson 16 Lesson 18 General Revision Words and Expressions