The CSSE 11 plus exam is used by selective grammar schools in Essex — including Chelmsford County High School for Girls, Colchester County High School for Girls, King Edward VI Grammar School, and others in the consortium. The CSSE 11 plus maths paper has a distinctive structure and demands a preparation approach that is calibrated to its specific requirements, not simply a generic 11+ revision plan.

How the CSSE Maths Paper Differs From GL and CEM

Parents and students who have prepared for GL or CEM papers sometimes underestimate how differently the CSSE paper is constructed. Where GL Assessment papers tend to present shorter, more self-contained questions, the CSSE maths paper — particularly at schools in the Chelmsford and Colchester consortium — includes longer multi-step problems that require sustained reasoning across several calculations.

The paper is not multiple choice. Students write their answers and, crucially, show their working. This means that method marks matter: a student who sets out a correct approach but makes an arithmetic error at the final step may still receive credit. It also means that working must be presented clearly — scruffy or disorganised working makes it harder for a marker to award partial credit, even when the method is correct.

The time pressure is real. The CSSE maths paper typically allows approximately one minute per mark, and many students find the final quarter of the paper difficult to reach if they have spent too long on earlier questions. Time management — knowing when to move on and return — is as important as content knowledge.

The Maths Topics Tested by CSSE

CSSE maths tests the primary school curriculum to a high standard, with an emphasis on reasoning and application rather than recall. The topic areas that appear consistently include:

  • Number — place value, factors, multiples, primes, squares, cubes
  • Fractions, decimals, and percentages — conversion, comparison, calculation
  • Ratio and proportion — sharing in a ratio, finding missing quantities
  • Algebra — simple expressions, equations, pattern spotting, nth terms
  • Geometry — area, perimeter, volume of composite shapes; angle properties
  • Data — interpreting tables, charts, and averages
  • Word problems — multi-step, often combining two or more topic areas

The word problems are particularly characteristic of the CSSE format. A question might combine ratio, fractions, and percentage in a single scenario — requiring the student to identify which operation applies at each step, rather than simply recognising a topic type and applying a method.

The Bar Model as a CSSE Preparation Tool

For the multi-step word problems that define the CSSE paper, the bar model method is particularly valuable. Bar models give students a visual structure for problems that would otherwise require holding multiple quantities in working memory simultaneously.

Consider a CSSE-style question: “A school has 360 pupils. Two-fifths of them study French. Of those who study French, three-quarters also study Spanish. How many pupils study both French and Spanish?” A student using a bar model would first represent the 360 pupils in five equal sections, identify two-fifths as 144, then divide those 144 into four equal sections and identify three-quarters as 108. The structure of the problem is visible at every stage.

This approach — dividing the problem into manageable visual steps — also produces clear working that markers can follow. It is a natural fit for a paper that rewards method as well as correct final answers.

The Bar Model Company’s training resources at barmodel.co.uk are an excellent complement to exam preparation for parents who want to understand the visual approach in more depth.

When to Begin CSSE Preparation

The CSSE exam typically takes place in September of Year 6, which means most preparation happens across Year 5 and the summer before Year 6. Students who begin structured preparation in Year 5 — covering content at a measured pace and building fluency across all topic areas — arrive at the final preparation phase with the confidence that comes from thorough grounding.

A common pattern among students who find the paper difficult is that they have covered the topics but not developed the flexibility to apply them in unfamiliar combinations. Preparing for CSSE maths means practising multi-step problems across mixed topic areas — not just rehearsing individual skills in isolation.

Our guide to 11 plus maths word problems and our resource on grammar school entrance exam maths both address the multi-step reasoning skills that the CSSE format demands.

How Singapore Maths Academy Prepares CSSE Students

At Singapore Maths Academy, our 11+ maths tuition for CSSE candidates is structured around the specific demands of the Essex consortium papers. Our tutors are familiar with the CSSE format and approach preparation with the depth-first principle that characterises Singapore Maths: fewer topics covered superficially, and every topic covered thoroughly enough that students can apply it flexibly.

Sessions use carefully sequenced problems, building from single-step to multi-step applications across every major topic area. Students develop the habit of drawing bar models and showing clear working — skills that directly serve their performance on the day. Progress is tracked across topics so that preparation is targeted, not general.

You can see examples of our problem-solving approach on our YouTube channel.

To discuss a place for your child, talk to us about a place and we will advise on the right preparation timeline for the CSSE exam.