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Key stage

A block of school years used to organise the national curriculum and its assessments. England has Key Stages 1 to 4 (with the EYFS before and 16 to 19 study after).

Also called
KS
Used in
England, Wales, Northern Ireland
Topic
Curriculum

Being checked against official sources. This definition is written in our own words; always check the official guidance for your country.

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Key Stage 1 (KS1) England Northern Ireland
In England, Years 1 and 2 (ages 5 to 7). In Northern Ireland, Key Stage 1 is Primary 3 and 4 (after the Foundation Stage in P1 and P2).
Key Stage 2 (KS2) England Northern Ireland
In England, Years 3 to 6 (ages 7 to 11), ending with the KS2 national curriculum tests. In Northern Ireland, Primary 5 to 7.
Key Stage 3 (KS3) England Northern Ireland
In England, Years 7 to 9 (ages 11 to 14). In Northern Ireland, Years 8 to 10.
Key Stage 4 (KS4) England Northern Ireland
In England, Years 10 and 11 (ages 14 to 16), when most pupils study for GCSEs. In Northern Ireland, Years 11 and 12.
Key Stage 5 (KS5) England
An informal name for 16 to 19 education (Years 12 and 13) in England, such as A levels and T Levels. It is not a statutory key stage of the national curriculum.

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Definitions are written by Classfern in our own words for teachers in the UK and the US. They are short explanations, not legal or official definitions: always check the official guidance for your country, nation or state. Classfern is not affiliated with or endorsed by any government department, inspectorate or exam board named here.