Chesham Grammar School: 11+ Entry Guide for Parents 2026

Chesham Grammar School is a co-educational selective grammar school founded in 1947, located on White Hill in Chesham, Buckinghamshire. It admits approximately 120 Year 7 pupils annually through the Buckinghamshire Secondary Transfer Test — known locally as the Bucks 11+ — which uses GL Assessment and covers verbal reasoning, non-verbal reasoning, and mathematics. The test is taken in September of Year 6. Chesham Grammar School is the only grammar school serving the Chesham area in the Chiltern Hills — a mixed school, making it the sole co-educational selective option for families in the Chess Valley and surrounding towns. This guide covers everything parents need to know about 11+ entry for 2026 and 2027, including the test format, competition ratios, preparation timeline, and how to give your child the best possible chance of a place.

What Is the Buckinghamshire 11+ Entrance Exam?

The Buckinghamshire Secondary Transfer Test is the single entrance assessment used by all grammar schools in Buckinghamshire, including Chesham Grammar School. Administered by GL Assessment, it is taken on a single Saturday in September of Year 6 at designated test centres across the county. All children registered for any Buckinghamshire grammar school sit the same test on the same day — there is no separate school-specific entrance exam. The test is standardised by age: a child's raw score is adjusted for their date of birth to ensure that older children in the year group are not unfairly advantaged over younger pupils.

The test comprises three components: verbal reasoning, non-verbal reasoning, and mathematics. Verbal reasoning tests a child's ability to recognise patterns in language, decode word meanings, and apply logical rules to sequences and codes. Non-verbal reasoning tests spatial awareness and pattern recognition using shapes, grids, and abstract diagrams — skills that are less tied to curriculum content and more reflective of underlying reasoning ability. The mathematics section covers content broadly aligned with the Key Stage 2 curriculum, including number, fractions, percentages, geometry, data handling, and problem-solving. All three components are presented in multiple-choice format on an answer sheet. The test is timed, and children must work quickly and accurately.

Results are returned to parents as standardised scores. Children who exceed the qualifying threshold are formally assessed as grammar school-able and may list any Buckinghamshire grammar school as a preference on their secondary school application form, submitted to the local authority in October. Approximately 9,500 children sit the Bucks 11+ each year for approximately 1,900 grammar school places across all schools in the county — a pass rate of approximately one in five, or 20%.

Item	Details
Entry Year	Year 7 (September 2026 for current Year 5 pupils)
Exam Board	GL Assessment (Buckinghamshire Secondary Transfer Test)
Approximate Places	Approximately 120
Test Subjects	Verbal reasoning, non-verbal reasoning, mathematics
Test Format	Multiple-choice, standardised by age
STT Weighting	50% verbal ability (Paper 1) · 25% maths · 25% non-verbal reasoning (Paper 2)
Typical qualifying score	121 (standardised; may vary slightly year to year)
Test date 2026	Thursday 10 September 2026
Results	Friday 9 October 2026
CAF deadline	Saturday 31 October 2026
School Type	Co-educational selective grammar school
County-Wide Pass Rate	Approximately 1 in 5 (around 20% of all test-takers qualify)

How Competitive Is Entry to Chesham Grammar School?

Entry to Chesham Grammar School is highly competitive. Buckinghamshire is one of England's few remaining fully selective counties — the majority of state secondary schools in the county are grammar schools, and the Bucks 11+ is the gateway to all of them. Approximately 9,500 children sit the Secondary Transfer Test each September, competing for around 1,900 total grammar school places. Chesham Grammar School is the only co-educational grammar option in the Chiltern district; the Challoner schools in nearby Amersham and Little Chalfont are single-sex, making Chesham Grammar an important alternative for families seeking mixed selective education.

In practice, the effective pass threshold for the most popular schools is higher than the county-wide 20% rate would suggest. Children who score just above the qualifying threshold may find that higher-scoring children fill the available places at their preferred school. For Chesham Grammar School, families should aim to prepare their child to score comfortably above the threshold, not just to scrape past it.

It is also worth understanding what "passing" the Bucks 11+ means. Passing makes a child eligible for any grammar school in the county — it does not guarantee a place at any specific school. Placement depends on the child's standardised score, the preferences listed by the family, and the score distribution in that year's cohort. A child with a high score who lists Chesham Grammar School as their first preference is very likely to secure a place. A child who barely passes and lists it as a preference faces more uncertainty.

Buckinghamshire uses a standardised scoring system, which means that a child born later in the academic year (a "summer birthday") is not penalised for being younger when they sit the test. This is a fair system, but it also means that all children — regardless of birth month — need to reach the same standardised benchmark to qualify.

What Does the Bucks 11+ Test Cover in Detail?

Verbal reasoning is the component most unfamiliar to children who have not prepared specifically for the 11+. GL Assessment verbal reasoning includes question types such as: finding the odd one out in a group of words, inserting a word that completes two other words simultaneously (compound word questions), moving a letter from one word to another, completing analogies ("apple is to fruit as pea is to ___"), number codes applied to words, and sequences of letters or numbers governed by rules. Many of these question formats do not appear anywhere in the primary school curriculum and must be learned deliberately through targeted practice. Because GL Assessment uses consistent question formats, this component is highly trainable.

Non-verbal reasoning involves pattern recognition, spatial rotation, reflection, shape sequences, matrices (finding which shape completes a grid), and analogies expressed through shapes rather than words. Many children find non-verbal reasoning the most surprising component because it tests abilities they have rarely been formally asked to demonstrate. However, it is also highly trainable: once the question types are explained and practised, most children show significant improvement relatively quickly. Non-verbal reasoning is often where the greatest preparation gains can be made in a short period of time.

Mathematics at 11+ level covers the full Key Stage 2 curriculum but with a focus on application and problem-solving rather than rote recall. Children should be fully secure on multiplication, division, fractions, decimals, percentages, ratios, geometry (area, perimeter, angles, coordinates), data handling (mean, mode, median, range, interpreting charts and graphs), and multi-step word problems. The maths section of the Bucks 11+ tests the same content as a strong KS2 SATs preparation, but at a faster pace and with more demanding application questions. The key differentiator is the ability to work accurately under time pressure on problems that require multiple steps of reasoning.

When Should We Start Preparing for the Chesham Grammar 11+?

Most families who successfully prepare children for Chesham Grammar School begin structured 11+ preparation around 12-18 months before the September test. For a child sitting in September 2027, this means starting in Year 4 (autumn or spring term) or at the very latest by September of Year 5. A Year 4 start allows time to build all three subjects from scratch, practice extensively, and enter the exam feeling calm and prepared rather than rushed.

Starting too early — in Year 3, for example — is usually counterproductive unless a child has significant identified gaps to address. Children at this age often lack the maths knowledge base needed for the test, and an excessively long preparation period can cause loss of motivation and anxiety. Starting too late — in the summer term of Year 5, just weeks before the September test — compresses the preparation into an anxious few weeks that leaves children under-prepared and stressed.

The optimal preparation structure covers three phases. In the first phase (roughly months 1-4 of a 12-month plan), the focus is on building the maths curriculum base and introducing verbal and non-verbal reasoning question types for the first time. Many children in Year 4 have never seen a verbal reasoning question — the first phase introduces the formats with no time pressure, building understanding before speed. In the second phase (months 5-8), children work through progressively harder practice papers under timed conditions, identifying and addressing weak areas through targeted support. In the third phase (months 9-12, leading into the September test), the focus shifts to exam stamina, accuracy under time pressure, and confidence-building through full mock tests under realistic conditions.

Children who prepare in this structured, phased way — with a qualified tutor who identifies and addresses gaps — typically outperform children who rely on self-study with workbooks alone, or who begin intensive cramming in the final weeks. The difference is not primarily about natural ability; it is about preparation quality, consistency, and having someone who can explain why answers are what they are rather than just marking them right or wrong.

What Do High-Scoring Children Do Differently?

Based on our tutors' experience preparing children for the Buckinghamshire 11+, there are clear and consistent differences between children who score well above the qualifying threshold and those who narrowly pass or fall short. These differences are not primarily about raw academic ability — they are about preparation quality, structure, and mindset.

They start early and work consistently. Children who score in the top percentile almost always began preparation at least 12 months before the test. They worked steadily through all three subject areas — not just the ones they already found easiest — and had a tutor who identified gaps and addressed them directly. Consistent weekly practice over a long period builds both knowledge and confidence in ways that last-minute cramming cannot replicate.

They practise under timed conditions regularly. The Bucks 11+ rewards speed as well as accuracy. Children who have done extensive practice under realistic time pressure — including full mock tests under exam conditions — are significantly less anxious on test day and more likely to complete all questions. Children who have only done untimed practice frequently run out of time on sections they understand well but haven't trained to complete quickly.

They understand each question type before the exam. GL Assessment verbal and non-verbal reasoning papers follow a predictable and consistent set of question formats. Children who have been explicitly taught each format — and who understand the underlying logic of each question type — perform significantly more accurately than those who have only guessed their way through practice papers. Understanding the structure of the question is often the key to consistent, reliable performance on novel questions.

They have addressed their maths gaps early. A surprising number of children who underperform on the maths section of the 11+ have specific curriculum gaps — insecure understanding of fractions, or confusion with ratio, or an inability to work with negative numbers quickly — that would have been straightforward to address with a few weeks of targeted teaching. Auditing the KS2 maths curriculum against the child's actual knowledge at the start of preparation, and filling any gaps before moving to timed practice, is one of the highest-value steps a family can take.

They maintain a healthy attitude throughout preparation. Children who perform best on test day are those whose parents have maintained calm, consistent encouragement throughout preparation. Test anxiety is a genuine performance constraint, particularly for children who are aware that this is a high-stakes assessment. Children who have been allowed to develop a relaxed relationship with practice — trying hard, making mistakes, improving over time — perform closer to their true ability on the day itself.

How Does Chesham Grammar School Compare to Other Buckinghamshire Grammars?

Buckinghamshire's 13 grammar schools are united by the shared Bucks 11+ entrance test but differ in character, catchment, specialism, and school ethos. Chesham Grammar School competes for students with Dr Challoner's Grammar School (boys, Amersham) and Dr Challoner's High School (girls, Little Chalfont), among others. Understanding where Chesham Grammar sits in the local landscape helps families make informed decisions about school preferences when completing the secondary school application.

All Buckinghamshire grammar schools use the same GL Assessment standardised test. This means that a child who qualifies for one is theoretically qualified for all — what determines which school a child attends is primarily the order in which parents list preferences and, where a school is oversubscribed with qualified applicants, whether the child scored highly enough to be prioritised. In practice, the most popular schools attract the highest-scoring children, because families who list them first tend to be those whose children have prepared most carefully.

The choice between grammar schools often comes down to practical factors: distance from home, school type (single-sex vs mixed), specialism or sixth form provision, and co-curricular strengths. For families with more than one child, the distinction between single-sex and mixed schools is often a significant factor. For working parents, the school's location relative to public transport and its after-school provision are important practical considerations. We strongly recommend attending open evenings at Chesham Grammar School — typically held in the autumn term of Year 5 — to form a view of the school's culture and environment that goes beyond published statistics.

For a comprehensive overview of all Buckinghamshire grammar schools and how the Bucks 11+ works as a whole, see our Grammar School Preparation Complete Guide 2026. For a detailed breakdown of the GL Assessment and how it differs from the CEM tests used in other parts of England, see our GL Assessment 11+ Parent Guide 2026. For general guidance on how to approach the test and maximise your child's score, see our How to Pass the 11+ guide for 2026.

For official and up-to-date admissions information, visit the Chesham Grammar School admissions page and the Buckinghamshire Council secondary transfer test pages for the latest registration deadlines and procedures.

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