The ISEB Pre-Test is the most widely used computerised entrance assessment for independent senior schools in England. Taken online and adaptive in nature, it is used by leading independent schools to screen pupils before the main entrance exams. This guide covers everything parents need to know.
At A Glance
The ISEB Pre-Test is a computerised assessment created by the Independent Schools Examinations Board (ISEB). It is used by many leading independent senior schools as an early screening tool, usually taken in Year 6 or Year 7, well before the main entrance examinations and interviews. The test is delivered online and is adaptive, meaning the difficulty of questions adjusts in real time based on how the child is performing. Because a single ISEB Pre-Test result can be shared with several schools, it reduces the number of separate assessments a child needs to sit. The ISEB Pre-Test is very much active and has become the standard early-stage assessment for a large number of prestigious independent schools across England.
The ISEB Pre-Test is used by independent senior schools across England, not by state grammar schools
| Area | Details |
|---|---|
| London | Many leading London independent senior schools use the Pre-Test as part of their selection process |
| South East | Independent schools across Surrey, Kent, Sussex and the Home Counties use the Pre-Test for early screening |
| Boarding Schools | A large number of well-known independent boarding schools across England use the Pre-Test, often before Common Entrance |
| Day Schools | Selective independent day schools use it to manage large applicant numbers efficiently |
| School Type | Used almost exclusively by fee-paying independent schools — state grammar schools generally use GL Assessment or CEM instead |
| Consortium Use | Some groups of independent schools accept a shared Pre-Test result, reducing the number of tests a child sits |
Always check the admissions page of each target school to confirm whether the ISEB Pre-Test is required and how it fits into their overall selection process.
The ISEB Pre-Test is quite different from traditional paper-based 11+ exams. It is taken on a computer, is adaptive, and the questions automatically adjust in difficulty as the child answers. Understanding the online and adaptive nature of this test is key to preparing well.
| Feature | Details |
|---|---|
| Answer Format | Multiple choice — answers selected on screen using a mouse or touchpad |
| Delivery | Online and computer-based (not paper) |
| Adaptive? | Yes — question difficulty adjusts in real time based on the child’s answers |
| Number of Sections | Four sections: English, Mathematics, Verbal Reasoning and Non-Verbal Reasoning |
| Duration | Around 2 to 2.5 hours in total, often split so it can be taken in more than one sitting |
| Where Taken | Usually sat at the child’s current school or at the target senior school, in supervised conditions |
| One Result, Many Schools | A single Pre-Test result can usually be shared with several senior schools the family is applying to |
The ISEB Pre-Test assesses four core areas, each as a separate timed section
Reading comprehension, vocabulary, spelling, grammar and punctuation. Children read passages on screen and answer multiple-choice questions testing understanding, inference and language knowledge.
Arithmetic, number, problem-solving, data handling, shape and measures aligned to the Key Stage 2 curriculum. Questions test both fluency and the ability to apply maths to unfamiliar problems.
Word logic, codes, analogies, letter sequences and sentence completion. Tests the ability to think and reason using words, often with no separate teaching at primary school, so practice matters.
Pattern recognition, sequences, matrices, rotations and spatial reasoning using shapes and diagrams rather than words. Tests logical thinking and is largely independent of reading ability.
All four sections are taken by every child. Unlike some regional grammar exams, the ISEB Pre-Test always includes verbal and non-verbal reasoning alongside English and Maths.
The test adjusts as the child works. Correct answers lead to harder questions and incorrect answers lead to easier ones. This means the experience feels challenging throughout, which is normal and by design.
Every question is multiple choice and answered by clicking or tapping. There is no handwriting and no extended written answers. Children should be comfortable using a mouse or trackpad before test day.
Each section is individually timed. Children cannot return to earlier questions once a section ends, so they must work steadily and avoid getting stuck. Familiarity with on-screen timing reduces stress.
| Aspect | Details |
|---|---|
| Score Type | Standardised Age Score (SAS) with an average of 100 and standard deviation of 15 |
| Age Adjustment | Scores are adjusted for the child’s age so younger and older children in the year group are compared fairly |
| What Schools See | Senior schools receive standardised scores for each section along with an overall picture of the child’s ability |
| No Fixed Pass Mark | There is no single national pass mark — each school decides how to weight the result alongside interviews, reports and their own assessments |
| Results Sharing | One result can usually be shared with several schools, and results are sent directly to the schools rather than to parents |
| Part Of A Bigger Picture | The Pre-Test is typically a screening stage, with final decisions also based on interviews and further entrance assessments |
Registration for the ISEB Pre-Test is handled through the independent senior schools a family is applying to, rather than directly with ISEB. Parents usually register their interest with each target school, and the school arranges access to the test. Registration windows vary between schools but typically open in the year before the test is taken, often during Year 5 or the start of Year 6. The test itself is generally arranged by the child’s current prep or primary school, or sat at the senior school. Because deadlines and processes differ from school to school, parents should contact the admissions office of each target school early to confirm exactly when and how to register, and whether a single shared result will be accepted.
A typical timeline for the ISEB Pre-Test process, described as recurring patterns
| When | What Happens |
|---|---|
| Year 4 | Build strong English and Maths foundations, encourage wide reading and introduce reasoning skills gently |
| Year 5 | Begin focused preparation in verbal and non-verbal reasoning and start using on-screen practice to build computer familiarity |
| During Year 5 / Start of Year 6 | Registration with target senior schools typically opens — contact admissions offices to confirm dates |
| Autumn / Winter of Year 6 | The ISEB Pre-Test is most commonly sat during this period, though exact timing varies by school |
| Shortly After The Test | Results are sent to the senior schools, often used to decide who progresses to interview and further assessment |
| Later In Year 6 / Year 7 | Shortlisted children attend interviews and, for some schools, sit further entrance exams or Common Entrance |
| Offer Stage | Schools make their offers according to their own admissions timetables, which differ from the state school National Offer Day |
Independent school timelines vary widely. Some schools test in Year 6 for Year 7 entry, while others test earlier for later entry, so always confirm with each school.
Strong English and Maths underpin every section. Encourage wide reading, vocabulary growth and confident arithmetic from Year 4. Reasoning skills can be introduced gradually so they feel familiar by Year 6.
Because the test is online and adaptive, use computer-based practice so your child is comfortable answering questions on screen, managing a mouse or trackpad and working against an on-screen timer.
Verbal and non-verbal reasoning are rarely taught at primary school, so steady regular practice is the most common gap. A common mistake is leaving reasoning until the last minute. Build it in early and little-and-often.
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