Table 1.

Key Stage Corresponding to Age Ranges in England

Key Stage	Age Range
Key Stage 1 (KS1)	5–7 years
Key Stage 2 (KS2)	7–11 years
Key Stage 3 (KS3)	11–14 years
Key Stage 4 (KS4)	14–16 years
Post-16 provision	Varied; compulsory education in England is 16–18 years and we focused on this group, but many post-16 provision options extend to age 25