Colchester Royal Grammar School is one of England's oldest and most academically distinguished state grammar schools, tracing its origins to 1206. Every year, hundreds of families across Essex and beyond prepare their sons for the 11+ entry process, competing for approximately 128 Year 7 places at a school that consistently produces outstanding GCSE and A-Level results and sends a significant proportion of its sixth-formers to Russell Group universities. This guide covers everything you need to know about the CRGS 11+ for 2026: the exam format, the score you actually need, how competitive the school really is, how it compares to Colchester County High School for Girls, and what effective preparation looks like.
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CRGS is a boys' selective grammar school in Colchester, Essex. Admission to Year 7 is determined entirely by performance in the CSSE (Consortium of Selective Schools in Essex) 11+ exam. The table below summarises the key facts for 2026 entry. Note that the exam in September 2026 is for entry to Year 7 in September 2027; dates shown reflect the 2026 registration and testing cycle. Always confirm current-year dates directly with CRGS and the CSSE website.
| Detail | Information |
|---|---|
| School type | Boys' selective state grammar school (co-educational Sixth Form) |
| Address | Lexden Road, Colchester, Essex CO3 3ND |
| Approximate Year 7 places | 128 |
| Total pupils | Approximately 930 |
| Exam board / consortium | CSSE (Consortium of Selective Schools in Essex) |
| Subjects tested | English (comprehension + creative writing) & Mathematics only — no VR or NVR |
| CSSE registration opens | 12 May 2026 |
| CSSE registration closes | June 2026 |
| Exam date | September 2026 (typically second or third Saturday of term) |
| CAF deadline | 31 October 2026 |
| Results released | January 2027 |
| National offer day | 1 March 2027 |
| Open Day | June (check CRGS website for exact date) |
| CSSE standard pass mark | 303 standardised score |
| CRGS effective threshold | Approximately 320+ standardised score |
| Ofsted rating | Good (inspected March 2023) |
| Academy status | Yes (since 2012) |
Most people are familiar with the CSSE exam as the common test used by Essex grammar schools, but fewer appreciate how significantly CRGS stands apart from the rest of the CSSE cohort. While all CSSE member schools use the same English and Mathematics papers, each school sets its own threshold for the minimum score it will accept. At CRGS, that threshold has historically sat noticeably higher than the standard CSSE qualifying mark, reflecting the school's status as the most oversubscribed boys' grammar in north Essex.
Founded in 1206 — making it one of the oldest schools in England — CRGS carries centuries of academic tradition alongside genuinely modern facilities. The school became grant-maintained in the 1980s and converted to academy status in 2012. Its academic record is consistent: students regularly achieve outstanding GCSE and A-Level outcomes, and the school's sixth form feeds a disproportionately high number of students into competitive universities. The extracurricular programme is unusually broad, ranging from languages societies and programming clubs to competitive rugby and an extensive music provision.
For families, the key distinction is that CRGS is not simply "an Essex grammar school that uses the CSSE" — it is a destination school that draws applicants from across the county and beyond. Competition for its 128 places is fierce. Understanding that reality is the starting point for effective preparation. For a broader overview of how the CSSE exam works and which other Essex schools use it, see our CSSE exam complete guide for Essex grammar schools.
CRGS uses the standard CSSE exam format, which means both papers are sat on the same day in September of Year 6. Unlike many other grammar school exams, the CSSE tests only two subjects: English and Mathematics. There is no verbal reasoning or non-verbal reasoning component at all. This is a critical point for families who are also preparing for London Consortium schools such as QE Boys Barnet or Henrietta Barnett, which test VR and NVR — those families will need a separate preparation track for each exam type.
English paper (approximately 70 minutes including reading time): The paper divides into two sections. The first is a reading comprehension, in which children read a passage — which may be fiction, non-fiction, poetry, or a combination — and answer questions testing retrieval, inference, vocabulary in context, and understanding of authorial technique. Questions require written responses, not multiple-choice answers. The second section is a creative writing task, in which children write a longer response to a given prompt, assessed on vocabulary range, structural control, originality, grammar, spelling, and punctuation.
Mathematics paper (approximately 60 minutes): The Maths paper covers the full KS2 curriculum with an emphasis on topics up to the end of Year 5, including number work, fractions, decimals, percentages, ratio and proportion, measurement, geometry, and data handling. Crucially, questions require children to show their working — there are no multiple-choice answers. This places a premium on mathematical fluency, clear method presentation, and systematic problem-solving rather than simply arriving at the right number.
Both papers are marked out of 60, and both scores are age-standardised to account for differences in age within the year group. The standardisation process means a child born in August is not penalised for being younger than a September-born peer sitting the same exam at the same time. The final standardised score from both papers determines eligibility.
One implication that many families miss is that the written-answer format of both CSSE papers rewards children who can work methodically and present their thinking clearly. In English, a child who produces technically accurate writing with genuine flair will score significantly higher than one producing competent but generic responses. In Maths, children who show clear working even when they make an arithmetic slip will lose fewer marks than those who write only final answers. Both of these habits are trainable with consistent practice.
This is where the CRGS picture differs most from general CSSE guidance, and where many families are caught out by relying on generic information about Essex grammar schools. The CSSE standard qualifying score of 303 is the floor for most CSSE schools — it indicates a child has demonstrated a sufficient level of academic ability to be considered. At CRGS, however, historical evidence consistently points to a much higher effective threshold of around 320 standardised points due to oversubscription.
To put this in context: a standardised score of 303 places a child in roughly the top 40% of CSSE candidates. A score of 320 places them in approximately the top 20–25%. This means CRGS is genuinely seeking children who are not merely "grammar school standard" but among the very highest-achieving CSSE candidates in any given year. Families who plan preparation around the standard CSSE threshold are targeting a materially lower bar than CRGS actually requires.
It is important to understand that no official "pass rate" for CRGS is published — the school does not release figures showing what percentage of applicants receive offers. What we know is that CRGS has approximately 128 Year 7 places and receives substantially more applications from qualifying candidates than it can accommodate. In years where the CSSE applicant pool is particularly strong, the effective score needed for an offer at CRGS may edge higher still. In practice, families should target a score of 320 or above as a planning benchmark while recognising that year-on-year variation means scores slightly below this may still receive offers if the pool is weaker in a given year.
When scores are equal — for example, if two candidates both achieve 323 — CRGS uses distance from the school (measured in a straight line from home to school) as the primary tiebreaker, with the closer child receiving priority. For more on how grammar schools resolve tied scores, see our guide to how grammar schools decide between equal-scoring children. The practical implication for CRGS families is that scoring comfortably above the effective threshold — rather than just at it — provides the most reliable buffer against this tiebreak uncertainty.
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Many families in the Colchester area are deciding not just about CRGS but about both selective schools in the town: CRGS and Colchester County High School for Girls (CCHS), located approximately one mile apart on the same side of town. Both are highly regarded state selective schools. Both use the same CSSE exam. Understanding the differences — and similarities — helps families plan effectively.
The most obvious difference is gender. CRGS is a boys-only school from Year 7 through Year 11, with a co-educational Sixth Form. Girls can join CRGS only for the Sixth Form, where they sit alongside the boys who have been at the school since Year 7. CCHS is girls-only throughout, including the Sixth Form. For families of boys, the only relevant selective state grammar in Colchester is CRGS. For families of girls, the equivalent school is CCHS, and the CSSE exam for CCHS entry is identical — the same papers, sat on the same day.
Because both schools use the same exam, a family sitting the CSSE once can list multiple CSSE schools on their Common Application Form (CAF), including both the relevant single-sex school and others across Essex. The test is taken once; individual CSSE schools then apply their own threshold to determine eligibility. A boy aiming for CRGS who also wishes to be considered for KEGS Chelmsford (King Edward VI Grammar School), for example, needs to list both on his CAF — no additional test is required.
In terms of academic reputation, both CRGS and CCHS are among the top-performing state schools in Essex. CRGS has a long tradition of excellence in sciences, mathematics, and languages, and its co-educational Sixth Form creates a distinctive environment in Years 12 and 13. CCHS students consistently achieve high A-Level grades and strong university outcomes. The choice between them, for the families who have a choice (i.e., those with daughters), often comes down to school culture, ethos, extracurricular provision, and which environment feels the better fit for an individual child rather than any meaningful academic distinction between the two.
One practical difference that parents sometimes overlook: both schools are oversubscribed, but the nature of that oversubscription differs slightly from year to year depending on the strength of the cohort. Families applying to both CCHS and CRGS (in a household with siblings of different genders, for example) need to register each child separately with the CSSE and complete separate CAF entries for each.
Preparation for CRGS should be thought of in phases, with the overall timeline beginning no later than the start of Year 5 and ideally in Year 4. Children aiming for the effective CRGS threshold of 320+ standardised need to be genuinely strong in both English and Maths, not simply competent. The following outlines how to structure preparation effectively.
Phase 1: Foundation building (Year 4 / early Year 5). At this stage, the goal is not test practice but genuine skill development. For English, this means wide reading — including challenging fiction, quality non-fiction, and poetry — combined with regular writing in different forms. Children who read broadly from an early age develop the vocabulary and structural instincts that underpin strong CSSE creative writing responses. For Maths, this phase focuses on mental arithmetic fluency, times tables mastery, and building solid understanding of fractions, decimals, and percentages. These are the foundations on which KS2 problem-solving depends.
Phase 2: Exam-specific skill development (Year 5). Once foundations are in place, preparation becomes more targeted. For English comprehension, children should work through inference questions, vocabulary-in-context exercises, and questions on authorial technique — the types of question the CSSE paper rewards at the top mark bands. Creative writing practice should focus on planning, structural variety, and the consistent use of ambitious vocabulary and literary technique. For Maths, this phase introduces the full range of KS2 topics in exam context: geometry, statistics, problem-solving sequences, and multi-step questions that require clear written working.
Phase 3: Timed practice and mock exams (late Year 5 into Year 6). From around the second half of Year 5, children should work regularly under timed conditions using full CSSE-format practice papers. Timed practice serves two purposes: it builds the exam stamina and pace management needed to complete both papers comfortably within time, and it identifies the question types and topic areas where additional targeted work is needed. Mock exams should be reviewed thoroughly — not just marked, but analysed for patterns in the errors made.
Phase 4: Final preparation (summer term and early Year 6). The final months before the September exam should balance continued timed practice with deliberate review of weaker areas identified in Phase 3. Crucially, the pace of new practice should taper off in August to allow children to arrive at the exam rested and confident rather than exhausted by over-preparation. Familiarity with the exam format, timing, and question types should be complete before the final month.
Throughout all phases, two habits distinguish the highest-scoring CSSE candidates from the rest: consistent reading, and the discipline of showing methodical working in Maths. Both are cumulative — they improve gradually with practice over months and years, not overnight. No amount of last-minute revision substitutes for these habits built over time. For specialist support with 11+ tuition, our tutors can design a personalised preparation plan that fits your child's starting point and the time available.
Leading Tuition offers specialist preparation for the CSSE 11+ examination used by CRGS and other Essex grammar schools. Our tutors have detailed knowledge of both the English and Mathematics CSSE papers and work with children from Year 4 through to the September exam. We understand what the highest-scoring CSSE responses look like in practice — not just what the mark scheme requires in theory — because our tutors have worked with successful CRGS candidates year after year.
Our approach to CRGS preparation reflects the specific demands of the school. Because CRGS typically requires scores above 320, we do not simply teach children to "pass" the CSSE — we work with them to develop the skills needed to perform in the top 20–25% of CSSE candidates. For English, this means building genuine writing craft alongside comprehension technique, not just drilling comprehension questions. For Maths, it means developing problem-solving fluency and clear method presentation, not just arithmetic speed.
Sessions are 1-to-1, online or in-person, and structured around each child's specific profile. A child who is already strong in Maths but needs development in extended writing will follow a very different plan from one who reads well but struggles with mathematical problem-solving. We assess each child at the outset and build a plan accordingly. Parents receive regular feedback on progress and areas to develop between sessions.
We are rated 4.8 out of 5 on Trustpilot by families across the UK and achieved a 95%+ offer rate for selective school entry in 2025 — including Essex grammar schools. For more on our approach to CRGS-specific preparation, visit our dedicated Colchester Royal Grammar School 11+ preparation page.
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The CSSE standard qualifying mark is a standardised score of 303, but CRGS is significantly more competitive than most CSSE schools. In practice, children typically need a standardised score of around 320 or above to receive an offer at Colchester Royal Grammar School. This is because the school receives far more applications than its approximately 128 Year 7 places. Scoring at the bare CSSE threshold is rarely sufficient; families should target the top 20–25% of CSSE sitters to be confident of an offer at CRGS specifically.
CRGS does not operate a formal geographic catchment area in the same way that some schools do, but distance from the school does function as the primary tiebreaker when two applicants have equal standardised scores. Boys from all over Essex and beyond are eligible to sit and apply. However, in oversubscription scenarios where scores are tied, the child living closest to the school on Lexden Road receives priority. Families outside Colchester are not disadvantaged by their postcode during the scoring stage itself — only at the tie-break stage if scores are identical.
The CSSE 11+ exam for 2027 Year 7 entry will be held in September 2026, typically on the second or third Saturday of the new academic year. Registration for the CSSE exam opens in April 2026 and closes in June 2026. Parents must also complete the Essex Common Application Form (CAF) naming CRGS as a preference by 31 October 2026. Results are released in January 2027, ahead of the national offer day on 1 March 2027. Always verify exact dates directly with the CSSE website and CRGS admissions office, as these can change from year to year.
No. The CSSE exam used by CRGS tests English and Mathematics only. There is no verbal reasoning (VR) or non-verbal reasoning (NVR) paper. This is a significant difference from the GL Assessment format used by London Consortium grammar schools, which include dedicated VR and NVR papers. For CRGS, preparation time is best concentrated entirely on English comprehension, creative writing quality, and mathematics problem-solving. Families preparing for both Essex CSSE and London Consortium schools will need to follow different preparation tracks for each exam type.
Both CRGS and CCHS are selective state grammar schools in Colchester, located approximately one mile apart, and both use the same CSSE exam. The key differences are gender and sixth-form structure. CRGS is a boys-only school from Year 7 to Year 11, with a co-educational sixth form. CCHS is girls-only throughout, including the sixth form. Both schools are highly competitive. Families with sons sit the same CSSE exam for both CRGS and any other CSSE schools they wish to apply to — the test is taken once, with results used across all preferred CSSE schools listed on the CAF.
Most successful CRGS candidates begin structured preparation in Year 4 or at the latest early Year 5. This allows 12–18 months of consistent, low-pressure practice before the September exam in Year 6. Starting earlier allows time for foundational skills — particularly extended writing and mathematical fluency — to develop naturally rather than through last-minute cramming. Beginning in Year 5 is still workable, especially with targeted tuition, but leaves less room for building strong writing habits. The CSSE English creative writing section in particular rewards children who read widely and write regularly from an early age.