GrammarPrep

Essex 11+ (CSSE): the full parent's guide

Essex grammars use their own test — CSSE — which looks nothing like GL or CEM. Here's what that means for your preparation, term by term.

CSSE 11+ (Essex 11+): key facts

Typical test date
A Saturday in September of Year 6
Papers
2 papers (written answers, not multiple choice)
Duration
English 60 minutes plus 10 minutes' reading time (comprehension + continuous writing); Mathematics 60 minutes
Subjects
English and Mathematics only — no stand-alone reasoning papers
Indicative qualifying threshold
Standardised scores vary by school; the most oversubscribed schools often require an aggregate well above 300/400
Registration window
Registration opens in May of Year 5 and closes in mid-to-late June (12 May – 19 June in 2026) — parents register directly with CSSE

Why Essex is different

Most Essex selective schools don't use GL Assessment or CEM. They commission their own papers through the Consortium of Selective Schools in Essex (CSSE), and the test format is materially different from the rest of England's grammar-school exams. Most notably, CSSE does not test verbal or non-verbal reasoning — only English and Mathematics — and uses free-response written answers rather than multiple choice.

This unique format matters for preparation. A child who has drilled GL verbal-reasoning question types will find those skills largely irrelevant on CSSE test day. What matters far more is depth in the English and Mathematics curricula, strong timed writing, and the ability to show working in Maths answers rather than simply picking a letter on an answer sheet.

Because CSSE is sat on a Saturday morning in September (rather than at each child's primary school), children experience a more formal, external exam environment. Building that test-day composure in advance is a genuine part of preparation, not an afterthought.

How the CSSE 11+ (Essex 11+) is structured

  • English paper: 60 minutes of working time after 10 minutes' reading time — a comprehension passage (tick-box and written answers) and continuous writing. Applied Reasoning questions were removed from 2025 entry onwards.
  • Mathematics paper (typically around 60 minutes): a mixture of numerical computation, problem-solving, geometry, and data questions. Children must show their working — simply writing an answer limits the marks available.
  • No verbal reasoning. No non-verbal reasoning. This is the most important distinction from GL/CEM areas.
  • Scoring is standardised by age, with English and Mathematics each worth 50%, and each participating school applies its own admissions policy to the CSSE results.
  • Chelmsford County High School for Girls is NOT a CSSE school. It runs its own entrance test (English, Mathematics and Creative Writing), with its own registration — registering with CSSE does not enter your daughter for it.
  • Children sit CSSE on a weekend at a designated venue, not at their own primary school.

Notable grammar schools in Essex

10 selective CSSE schools across the county.

  • King Edward VI Grammar School (Chelmsford)
  • Colchester Royal Grammar School
  • Colchester County High School for Girls
  • Westcliff High School for Boys
  • Westcliff High School for Girls
  • Southend High School for Boys
  • Southend High School for Girls

School guides in Essex

How to prepare your child for the Essex 11+

Focus preparation on depth and fluency in Maths and English. Because CSSE's English paper includes creative writing, your child needs practice producing a structured, well-punctuated piece of writing in roughly 20 minutes — the time CSSE's own past papers suggest for it — not just comprehension answers. Plan a weekly timed writing exercise from mid-Year 5 onwards.

CSSE Mathematics sits above the Year 5/6 National Curriculum in both breadth and depth. Work through past CSSE papers (available to purchase from the CSSE website) and supplement with problem-solving material such as NRICH. Speed matters: the test is demanding on time, and children who can only solve questions slowly will run out of the paper.

Don't skip verbal and non-verbal reasoning work entirely if you are also applying to an out-of-county school — but if your target is purely Essex CSSE schools, that practice time is better spent on Maths and English.

Frequently asked questions about the Essex 11+

How is CSSE different from GL and CEM?

CSSE is Essex-specific and tests only English and Mathematics, in a written (not multiple-choice) format. GL and CEM typically include verbal and non-verbal reasoning in multiple-choice format. If your child is taking both CSSE and a GL/CEM test, you will need to prepare in two different styles.

When do I register for CSSE and how much does it cost?

Registration opens in May of Year 5 and closes in mid-to-late June — for 2027 entry it ran from 12 May to 19 June 2026, with access-arrangement requests due a week later. CSSE publishes the next cycle's dates by Easter. Registering for the test is not an application for a school place: you still name schools on your council's Common Application Form by 31 October.

What is the Essex 11+ pass mark?

CSSE does not publish a single pass mark. Each school ranks applicants by standardised score and allocates places by rank (within catchment or sibling priority, depending on the school's admissions policy). The most competitive Essex grammars typically require aggregate scores well above 300 out of 400.

Is there past-paper practice for the CSSE?

Yes — CSSE publishes free English and Maths familiarisation papers on its website and sells practice packs. These are the single most useful preparation resource because the paper format is unique to CSSE; CSSE itself notes that commercial books are pitched at a similar level but not in the same format.

How early should we start CSSE preparation?

Start by the beginning of Year 4 for a September Year 6 test. Because CSSE requires genuine depth in Maths and English (rather than drill-based reasoning practice), starting with strong fundamentals in Year 4 and layering in CSSE-specific practice from Year 5 is the most effective approach.

Is Chelmsford County High School for Girls part of CSSE?

No. CCHS is its own admission authority and runs its own entrance test — English, Mathematics and Creative Writing — with a separate registration, usually in April to early June of Year 5. If your daughter is applying to CCHS and to any CSSE school, register for both tests. See our CCHS guide.

Can my child sit the CSSE if we don't live in Essex?

Yes — CSSE is open to out-of-area applicants. However, most participating schools prioritise in-catchment pupils after the exam score, so out-of-area children usually need a notably higher rank to secure a place.

Related 11+ guides

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