UK Key Stages: Explained

Navigating the UK education system can be challenging. Year groups replace “grades,” with primary and secondary schools divided into Key Stages, each ending with specific assessments like SATs or GCSEs.

Confused about the UK education system? Unsure about what year groups and key stages actually are? Do not worry, we are here to help!

In many countries across the world, pupils of different ages are grouped in what are termed ‘grades’. In the UK, these are called ‘year groups’, starting from ‘Reception’ (children aged 4-5) and ending with ‘Year 6’ (children aged 10-11) in Primary Schools, and starting at ‘Year 7’ (pupils aged 11-12) and ending with ‘Year 11’ (pupils aged 15-16) in Secondary Schools. Some secondary schools may also teach years 12 and 13 (ages 16-17 and 17-18 respectively).

Below is a list of each school type and the year groups and corresponding ages that they cover:

School Type Year Group Age Range Key Stage Major Assessment
Early Years Not applicable 3-4 Early Years Not applicable
Primary School Reception 4-5 Early Years Assessment of pupil’s starting points in language, communication, literacy, and maths; teacher assessments
Year 1 5-6 KS1 Phonics screening check
Year 2 6-7 KS1 National tests in English reading and maths. Teacher assessments in maths, science, and English reading and writing
Year 3 7-8 KS2 Not applicable
Year 4 8-9 KS2 Multiplication tables check
Year 5 9-10 KS2 Not applicable
Year 6 10-11 KS2 National tests in English reading, maths, and grammar, punctuation, and spelling. Teacher assessments in English writing and science
Secondary School Year 7 11-12 KS3 Not applicable
Year 8 12-13 KS3 Not applicable
Year 9 13-14 KS3 Not applicable
Year 10 14-15 KS4 Some children take GCSEs
Year 11 15-16 KS4 Most children take GCSEs or other national assessments
Sixth Form/College Year 12 16-17 KS5 Not applicable
Year 13 17-18 KS5 Not applicable

These year groups are each placed in to separate ‘Key Stages’, with a key stage encompassing multiple year groups. At the end of each Key Stage, the performance of each pupil will usually be assessed by their schools and teachers, with these assessments taking different forms depending on age.

The following list provides information on each Key Stage and the years it covers, alongside the assessments and learning typically undertaken by pupils at the end of each Key Stage.

Early Years Foundation Stage (EYFS):

Key Stage 1 (KS1):

Key Stage 2 (KS2):

Key Stage 3 (KS3):

Key Stage 4 (KS4):

More About GCSEs

Key Stage 5 (KS5)

Year 12

Year 13

Not all secondary schools will have provisions for post-16 students. Some, however, will have a sixth form or college which covers the ages of 16-18. Typically, A-Level (Advanced-Level) examinations will be taken, but there are other qualifications or exam types that can be taken in this Key Stage. A-Levels are graded from A*-E, with A* being the highest, and E the lowest. A-Levels are typically used by universities as an indicator of whether they can admit a student to their courses. Typically, a wider range of subjects are offered at A-Level than GCSE, which, again, depends on the school.

It is important for international teachers looking to teach in the UK to familiarize themselves with the UK Key Stages and the assessments undertaken at the end of each one. Though the differences between ages and year groups between countries may seem confusing, researching and gaining clarity on this will not only help you in potential job interviews with UK schools, but provide an excellent footing for your first UK teaching position.

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