Unit 1: Life
Unit 2: Work
Unit 3: Time out
Review 1: Units 1–3
Unit 4: Great minds
Unit 5: Travel
Unit 6: Fitness
Review 2: Units 4–6
Unit 7: Changes
Unit 8: Money
Unit 9: Nature
Review 3: Units 7–9
Unit 10: Society
Unit 11: Technology
Unit 12: Fame
Review 4: Units 10–12