Lessons by school year
School years have different names around the world, so we list them by age. A lesson appears in every year its age band covers.
| Age | US | UK (England) | India | Lessons |
|---|---|---|---|---|
| Ages 11–12 | Grade 6 | Year 7 | Class 6 | 5 lessons |
| Ages 12–13 | Grade 7 | Year 8 | Class 7 | 9 lessons |
| Ages 13–14 | Grade 8 | Year 9 | Class 8 | 11 lessons |
| Ages 14–15 | Grade 9 | Year 10 | Class 9 | 7 lessons |
| Ages 15–16 | Grade 10 | Year 11 | Class 10 | 6 lessons |