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Key stages: what it means

The stages into which compulsory schooling in England is divided, from key stage 1 (ages 5 to 7) to key stage 4 (ages 14 to 16).

The national curriculum in England is organised into key stages:

  • Early years foundation stage: up to the end of reception (age 5).
  • Key stage 1: years 1 and 2 (ages 5 to 7).
  • Key stage 2: years 3 to 6 (ages 7 to 11), ending with national tests often called SATs.
  • Key stage 3: years 7 to 9 (ages 11 to 14).
  • Key stage 4: years 10 and 11 (ages 14 to 16), usually ending in GCSEs.

Why it matters when checking a claim

  • Education statistics are published by key stage, so a claim about "primary results" usually means key stage 2 and "secondary results" key stage 4.
  • Wales, Scotland and Northern Ireland organise schooling differently, so key stage figures are not UK-wide.

See the Explore Education Statistics guide.

Also searched as: key stage 2, KS2, KS4, key stages uk ages, SATs

Official definitions: GOV.UK: The national curriculum · DfE: Key stage 2 attainment

Questions that use this term

Related terms

  • Attainment 8: A measure of GCSE-level results in England, adding up a pupil's points across eight qualifications, with English and maths counted double.
  • Progress 8: A value-added measure for secondary schools in England, comparing pupils' GCSE-level results with those of pupils nationally who had similar results at age 11.
  • Academic year: The year used in education statistics: usually September to August for schools and August to July for universities.
  • Disadvantage gap: The difference in attainment between disadvantaged pupils and other pupils. In England it is published as the disadvantage gap index.

More schools and education terms: Attainment 8 · Progress 8 · Education, health and care plan (EHCP) · Persistent absence · Disadvantage gap · Pupil premium · English Baccalaureate (EBacc).