The UK Education System Explained: KS1 to GCSE (Complete Guide)

England’s school system can be confusing if you did not go through it yourself, are new to the country, or simply want a clearer picture of how the stages your child is moving through connect to each other. Terms like KS2, SATs, GCSE, and Year 9 options get used as if everyone already knows what they mean, and most of the time nobody stops to explain the full picture.

This guide covers the structure of the English education system from primary school through to GCSE, including what each key stage involves, what assessments exist and when, how GCSE grades work, and what is currently changing following the government’s Curriculum and Assessment Review.

One important note before we begin: this guide covers England specifically. Scotland, Wales, and Northern Ireland each have their own education systems with different structures, qualifications, and key stages. If your child’s school is in Scotland, Wales, or Northern Ireland, the year groups and assessments will differ from what is described here.

Quick reference: England’s key stages at a glance

Early Years Foundation Stage (Reception)

Most children start school in Reception at age four or five. Reception is part of the Early Years Foundation Stage (EYFS), which runs from birth to the end of Reception and focuses on seven areas of learning: communication and language, physical development, personal, social and emotional development, literacy, mathematics, understanding the world, and expressive arts and design.

Two statutory assessments happen during Reception.

The Reception Baseline Assessment (RBA) is carried out within the first six weeks of a child starting Reception. It is a short, informal activity-based assessment that gives the school a starting picture of where a child is in early maths and literacy. It is not an exam. Children are unaware it is an assessment, and parents receive a note about it but not a score. The RBA now replaces end-of-KS1 tests as the baseline for measuring primary school progress.

The EYFS Profile is completed by the end of Reception. It assesses each child’s development against 17 Early Learning Goals across all seven areas of learning. Teachers assess whether each child is meeting the level expected at the end of EYFS. Results are shared with parents and passed on to Year 1 teachers.

Key Stage 1 (Years 1 and 2, ages 5 to 7)

Key Stage 1 covers the first two years of formal schooling. The focus is on foundational literacy and numeracy: reading, writing, phonics, and early maths. Children also begin to encounter science, history, geography, computing, music, PE, and religious education, though at a relatively simple level.

Year 1 Phonics Screening Check: what it is and what it tests

In June of Year 1, all children take a statutory phonics screening check. This is a short, one-to-one assessment in which each child reads 40 words to their teacher: 20 real words and 20 pseudo-words (invented words that test phonics decoding rather than recognition). There is no stress involved for the child. The purpose is to identify any children who are not decoding at the expected level so that they can receive additional support. Children who do not meet the expected standard in Year 1 take it again at the end of Year 2.

End of KS1: assessments are now optional

Until 2023, all children sat statutory KS1 tests at the end of Year 2. From September 2023, these tests became non-statutory: schools can choose whether to administer them but are no longer required to. Teacher assessment continues. Some schools still use the optional KS1 papers to help inform their judgements about pupils’ attainment, but you should not assume your child’s school will do this. [1]

Key Stage 2 (Years 3 to 6, ages 7 to 11)

Key Stage 2 is the longest key stage, covering four years at junior or primary school. The curriculum broadens significantly, with children studying a wider range of subjects in more depth. The core subjects are English, maths, and science. Foundation subjects include history, geography, computing, art, music, PE, design and technology, and at least one modern foreign language from Year 3 onwards. Religious education is also required, though it is not part of the National Curriculum itself.

Year 4 Multiplication Tables Check: statutory from 2022

Since 2022, all children in Year 4 have taken a statutory Multiplication Tables Check in June. This is a short online test in which children answer 25 multiplication questions from the 2 to 12 times tables. The purpose is to identify pupils who do not have secure times table knowledge and direct support to them before they reach KS3. Results are shared with parents. They are used for school accountability but not for individual pupil progression decisions.

Year 6 SATs: the main primary assessment

At the end of Year 6, children take statutory KS2 national tests, commonly called SATs. These tests cover English reading, English grammar, punctuation and spelling, and maths. They take place over four days in May each year. There are no science tests, though teachers continue to make teacher assessments in science.

SATs results are reported as scaled scores (with 100 as the expected standard) and are published for each school. They form the basis of primary school performance tables. For the individual child, the results are sent to the secondary school they will be joining in September, where they are used to set initial ability groups or streams in Year 7. After that point, SATs results have no bearing on GCSE entry, university applications, or employment.

The primary to secondary transition

Children move from primary school to secondary school at the start of Year 7, usually at age 11. In most of England this is a straightforward transition to a local secondary school, determined by proximity, sibling links, and parental preference, with local authority coordination through the admissions system. In some parts of England, including parts of Kent, Buckinghamshire, and Lincolnshire, there are selective grammar schools for which children sit the 11-plus exam.

The transition is a significant one. Secondary school involves moving to a larger building, having a different teacher for each subject, managing a more complex timetable, and meeting new peers. Research consistently shows that academic engagement and confidence can dip in the first year or two of secondary school, particularly in Years 7 and 8, as children adjust to the change.

Key Stage 3 (Years 7 to 9, ages 11 to 14)

Key Stage 3 covers the first three years of secondary school. There are no statutory national assessments at KS3: progress is measured through internal school tests, teacher assessment, and end-of-year exams set by the school itself. This means the quality and frequency of assessment varies between schools.

The curriculum at KS3 is broad by design. The National Curriculum requires all state schools to teach English, maths, science, computing, history, geography, modern foreign languages, art, music, PE, design and technology, and citizenship. Religious education is also required. Schools have flexibility in how they structure and sequence this content.

Year 9 options: one of the most significant decisions in secondary school

At the end of Year 9, or sometimes during Year 9, most secondary schools ask students to choose their GCSE option subjects. These choices determine which subjects the student will study in Years 10 and 11, and they cannot usually be changed once made.

Most schools require all students to continue with English Language, English Literature, maths, and combined science (or separate sciences). They then choose from a range of option subjects: typically three or four, chosen from a selection that might include history, geography, modern languages, art, music, drama, physical education, computer science, design and technology, business studies, religious studies, and others.

The EBacc is a government performance measure that covers English, maths, two sciences, a humanity (history or geography), and a modern or ancient language. Schools are not required to push all students towards EBacc subjects, but many do prioritise them in how option blocks are structured. It is worth checking your school’s approach when helping your child think through their choices.

Key Stage 4 (Years 10 and 11, ages 14 to 16): GCSEs

Key Stage 4 covers the two years leading to GCSE examinations. Most students take their GCSEs at the end of Year 11, typically at age 16. Some students take certain GCSEs early, usually maths or English, in Year 10, though this is not universal.

GCSEs are national qualifications assessed primarily by written examinations, with some coursework or practical assessment in certain subjects. They are set by exam boards, of which the main ones in England are AQA, Edexcel (Pearson), and OCR. Different schools enter students for different exam boards in different subjects, which is why a Year 10 student’s specification for biology, for example, will depend on which board their school has chosen.

GCSE grades: how the 9 to 1 system works

GCSEs were regraded from the A*-G scale to a 9-1 scale, with 9 being the highest grade. The transition happened in stages between 2017 and 2019 and is now complete across all subjects. [2]

The grades that matter most for future study are Grade 4 (standard pass) and Grade 5 (strong pass). Most sixth forms, colleges, and post-16 pathways set Grade 4 or Grade 5 in English and maths as minimum entry requirements, and some competitive programmes require higher grades across multiple subjects. Grade 9 is awarded to the very top performers nationally in each subject.

What comes after GCSE

In England, young people are required by law to remain in education or training until the age of 18. Most students therefore continue to some form of post-16 study after their GCSEs, even though compulsory schooling ends at 16. The most common routes are A Levels (typically two years at a school sixth form or sixth form college), T Levels (a newer technical qualification combining classroom learning with industry placement), vocational qualifications, or approved training programmes including apprenticeships.

Post-16 education is sometimes referred to informally as KS5, though this is not an official statutory term in the way KS1 through KS4 are. It is not covered in detail here, as this guide focuses on the compulsory school years from Reception to Year 11.

Who the National Curriculum applies to

The National Curriculum sets out what maintained state schools must teach and the standards children should reach at each stage. It applies to maintained primary and secondary schools across England, including maintained special schools.

Academy schools and free schools are technically not required to follow the National Curriculum, though they must provide a broad and balanced curriculum. In practice, the vast majority of academies and free schools structure their teaching around the same key stage content and enter their students for the same national assessments, including KS2 SATs and GCSEs, as maintained schools.

Independent (private) schools are not required to follow the National Curriculum at all, though most choose to enter students for GCSE or equivalent qualifications at the end of Year 11, as these are the widely recognised benchmark qualifications for entry to post-16 education and beyond.

What is changing: the Curriculum and Assessment Review 2025

In July 2024, the government established an independent Curriculum and Assessment Review chaired by Professor Becky Francis. The review published its final report, ‘Building a World-Class Curriculum for All’, in November 2025. [3]

The government responded the same day, broadly accepting the direction of the review. A revised National Curriculum is expected to be published in 2027 for first teaching from 2028. This means the changes will not affect children currently in school before approximately 2029-2030, though the reforms are significant and worth understanding.

Key recommendations from the review include:

• An oracy framework to sit alongside the existing frameworks for reading and writing, giving spoken language a more central role across all subjects.

• Updates to all programmes of study to include stronger representation of the diversity that makes up modern Britain.

• Reform of Progress 8 (the main accountability measure for secondary schools) with a broader measure of school performance that goes beyond exam results.

• A review of GCSE subject content and assessment to reduce assessment burden and better reflect the breadth of the curriculum.

For parents with children currently in primary or early secondary school, the most practical implication is that what your child studies will look somewhat different by the time they reach GCSE in 2030 or later. The key stages, year groups, and overall structure of the system are not changing.

Summary: the key facts to know

• England’s education system is organised into key stages (KS1 to KS4) covering ages 5 to 16.

• Statutory national assessments include the Phonics Screening Check (Year 1), the Multiplication Tables Check (Year 4), and KS2 SATs (Year 6). KS1 tests are now optional.

• There are no national assessments during KS3 (Years 7 to 9). Progress is measured by schools internally.

• GCSEs are taken at the end of Year 11. They are graded 9 to 1, with 9 being the highest. Grade 4 is a standard pass; Grade 5 is a strong pass.

• Young people are required to remain in education or training until age 18, but compulsory schooling ends at 16.

• A revised National Curriculum is expected from 2027, for first teaching in 2028. The key stage structure is not changing.

BrainStrata covers the full UK curriculum from KS1 to KS4, adapting to where each student actually is in their learning journey. Find out more at brainstrata.com.

Sources and further reading

[1] Department for Education (2023). KS1 tests to become non-statutory from September 2023. Confirmed by the Standards and Testing Agency. Schools Week, ‘Key stage 1 SATs will be scrapped from 2023-24, STA confirms’, 2022. NEU: ‘Key Stage 1 SATs have been non-statutory since the academic year 2023 to 2024. Schools do not need to administer key stage 1 tests or report results to parents or local authorities.’ Available at: neu.org.uk/assessment/primary-and-early-years-assessment/ks1-and-ks2-sats

[2] Department for Education. National curriculum assessments: past test materials and GCSE grade boundaries. The transition from A*-G to 9-1 grading took place subject by subject between 2017 and 2019. Available at: gov.uk/government/publications/gcse-and-a-level-grading-changes. Grade 4 = standard pass; Grade 5 = strong pass confirmed via Ofqual and DfE guidance.

[3] Curriculum and Assessment Review (November 2025). Building a World-Class Curriculum for All: Final Report. Government response published 5 November 2025. Revised curriculum to be published 2027, first teaching 2028. House of Lords Library summary available at: lordslibrary.parliament.uk/national-curriculum-and-assessment-review