Key Stage 3

Key Stage 3 (commonly abbreviated as KS3) is 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. In Northern Ireland the term also refers to the first three years of secondary education, although these are known as Year 8, Year 9 and Year 10.

England and Wales

Legal definition

The term is defined in the Education Act 2002 as "the period beginning at the same time as the school year in which the majority of pupils in his class attain the age of twelve and ending at the same time as the school year in which the majority of pupils in his class attain the age of fourteen".

This Key Stage normally covers pupils during their first three years of secondary education, although in some cases part or all of this stage may fall in a middle or high school. Some middle and high schools have been piloting accelerated Key Stage 3, by teaching the curriculum over two years.