The ISEB Common Pre-Test: A Parent's Guide (2026–27)
If your child is aiming for an academically selective independent senior school, there is a good chance the first hurdle is a single test they will sit once, at a computer, in Year 6 — and whose result is quietly shared with every senior school on your list. That test is the ISEB Common Pre-Test. It rarely gets the attention the 11+ grammar exams do, yet for many families it is the assessment that decides whether an offer follows. This guide explains what it is, what's on it, how it's scored, and how to prepare for a format most children have never met.
The ISEB Common Pre-Test at a glance
Before you do anything else:
- Ask every target school which assessment they use and in which term they expect your child to sit it — schools set their own test windows within the ISEB year.
- Register your child with the schools well ahead of the closing dates; some selective schools close registration a year or more before entry.
- Get your child comfortable working on screen against a clock — the adaptive format is the single biggest surprise for children used to paper practice.
What is the ISEB Common Pre-Test?
The ISEB Common Pre-Test is a shared online assessment used by many of the country's academically selective independent schools as part of their admissions process. It is set by the Independent Schools Examinations Board and taken on a computer. The word "pre-test" reflects its original purpose — an early screen, often two years before entry — but for 11+ entry it is frequently the decisive academic assessment.
Its defining feature is that it is a shared assessment. A child sits it once, and the result is made available to every senior school that asks for it. That removes the exhausting circuit of separate exams at every school, but it also raises the stakes on the one sitting.
The four sections
The test has four timed, multiple-choice sections, roughly 2 hours 15 minutes in total:
- English — comprehension plus spelling, punctuation and grammar. Around 40 minutes.
- Mathematics — Key Stage 2 content to the end of Year 5. Around 40 minutes.
- Verbal Reasoning — word meaning, logic and language-based reasoning. Around 25 minutes.
- Non-Verbal Reasoning — pattern, sequence and spatial reasoning with shapes and diagrams. Around 30 minutes.
Section timings can be adjusted between years and some schools split the sitting across more than one day, so confirm the current structure with ISEB and your target schools.
How it is scored
Results are age-standardised against a sample of children applying for independent-school places across the academic year, so a summer-born child is not disadvantaged for being younger, and a child who sits in the autumn is compared fairly with one who sits in the spring.
Schools receive a standardised score for each section and overall. There is no single national pass mark. Each school decides how it uses the result — some set a threshold to progress to an interview or a school-set exam, others weigh it alongside a reference, a report and a visit. A strong Pre-Test score is usually necessary but rarely sufficient on its own.
11+ or 13+?
Most children sit the Common Pre-Test in Year 6 for 11+ (Year 7) entry. A minority of senior schools — including some of the best known, such as Eton and Harrow — use it earlier, in Year 6 or 7, as the first stage of 13+ (Year 9) entry, with a conditional place then confirmed later by Common Entrance or the school's own exam.
The practical implication: check exactly which entry point each target school is assessing for, because it changes when your child sits the test and what follows it. Our guide to the 13+ exam and 13+ Common Entrance cover the later stages.
How to prepare
Practise on screen, against a clock. The adaptive, no-going-back format is the biggest adjustment. Children who have only done paper practice often lose marks to the mechanics rather than the content.
Build all four skills, not two. English and maths rest on a secure Key Stage 2 foundation; verbal and non-verbal reasoning are learnable through short, regular, question-type-focused practice. See our verbal vs non-verbal reasoning guide.
Prioritise vocabulary and reading. They feed the English section and the verbal reasoning section at the same time, and they are the slowest thing to build — start early. Our vocabulary guide covers a method that sticks.
Don't over-drill. Because the test adapts to ability, endless repetition of easy questions achieves little. Focus practice at the edge of what your child can currently do.
Frequently asked questions
What is the ISEB Common Pre-Test used for?
It is a shared online assessment used by many academically selective independent schools as part of admissions. Most children sit it in Year 6 for 11+ (Year 7) entry; some schools, including Eton and Harrow, use it earlier as the first stage of 13+ (Year 9) entry. A child sits it once and the result is released to every senior school that requires it.
What is on the ISEB Common Pre-Test?
Four timed, multiple-choice, adaptive online sections — English (comprehension plus spelling, punctuation and grammar), Mathematics, Verbal Reasoning and Non-Verbal Reasoning — totalling about 2 hours 15 minutes. English and maths follow the Key Stage 2 curriculum to the end of Year 5.
How is the ISEB Common Pre-Test scored?
Results are age-standardised against a national sample of independent-school applicants across the year, so younger children and those who sit earlier in the window are not disadvantaged. Schools receive standardised scores by section and overall. There is no single national pass mark — each school decides how to use the result.
Can you retake the ISEB Common Pre-Test?
It is designed to be sat once per admissions round, and the shared result is released to all the schools that require it. A child would normally only sit it again in a later admissions round for a different entry year. Check with your target schools, as policies on re-sits and on late sittings vary.
How do you prepare for the adaptive format?
Practise on a computer against a timer, and build a firm habit of choosing a best answer and moving on, because the test does not let a child skip a question or return to change an answer. Beyond that, prepare the underlying skills: secure Key Stage 2 English and maths, plus regular short verbal and non-verbal reasoning practice.
Is a good Pre-Test score enough to get an offer?
Usually necessary, rarely sufficient. Many schools use the Pre-Test as a threshold to progress to an interview or a school-set exam, then weigh it alongside a school reference, a report and a visit. Treat a strong score as the entry ticket to the next stage, not the finish line.
Related SharpY Mind resources
Four sections, one sitting, no second chances
English, maths, verbal reasoning and non-verbal reasoning — SharpY Mind builds all four in short daily sessions, so nothing on the screen comes as a surprise.
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