In dictionaries:
Key Stage 3
(commonly abbreviated as KS3) the legal term for the three years of schooling in maintained schools in England and Wales normally known as Year 7, Year 8 and Year 9, when pupils are aged between 11 and 14.
Key Stage 4
the legal term for the two years of school education which incorporate GCSEs, and other examinations, in maintained schools in England normally known as Year 10 and Year 11, when pupils are aged between 14 and 16 by August 31.
Key Stage 5
a label used to describe the two years of education for students aged 16–18 and at sixth form or college.
Key Stage 1
the legal term for the two years of schooling in maintained schools in England normally known as Year 1 and Year 2, when pupils are aged between 5 and 7.
Key Stage 2
the legal term for the four years of schooling in maintained schools in England and Wales normally known as Year 3, Year 4, Year 5 and Year 6, when the pupils are aged between 7 and 11 years.
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