Key stage
From OER in Education
The stages are as follows:[1]
| Key Stage (KS) | Ages | Duration | School years (Y) | Forms | Final exams |
| 0 | 3–5 | 2 years (1 compulsory) | Nursery, Reception | Nursery, Infant Reception Class | |
| 1 | 5–7 | 2 years | 1–2 | 1st–2nd form infants | KS1 SATS, Phonics and Reading Check (taken in Year 1 but may be retaken if failed in Year 2) |
| 2 | 7–11 | 4 years | 3–6 | 1st–4th form juniors | SATS Tests, 11 plus (generally only for Grammar School entry) |
| 3 | 11–14 | 3 years | 7–9 | 1st–3rd form secondary | |
| 4 | 14–16 | 2 years | 10–11 | 4th–5th form secondary | GCSEs |
| 5 | 16–18 | 2 years | 12–13 | Sixth form secondary, also FE college | A-Levels, AS-Levels, NVQs, National Diplomas |
Adapted from https://en.wikipedia.org/wiki/Key_Stage
