The ISEB Common Pre-Test: What Parents Need to Know

The ISEB Common Pre-Test is an online, adaptive assessment developed by the Independent Schools Examinations Board (ISEB) and used by a large number of independent senior schools across the UK as part of their admissions process. Instead of every school setting and marking its own separate entrance paper, participating schools share this single common test, and a child generally only needs to sit it once, with the results then sent to each school the family has applied to.

This is a meaningful convenience for families applying to several independent schools, since it avoids sitting several near-identical exams in quick succession purely because each school historically ran its own version. That said, not every independent school uses the Common Pre-Test — many still set their own bespoke papers, sometimes alongside it, sometimes instead of it — so always check each school's specific admissions requirements.

The Common Pre-Test is taken on a computer, usually at the child's current (junior) school under exam conditions, rather than at the senior school itself. It covers four areas: English, Mathematics, Verbal Reasoning and Non-Verbal Reasoning, delivered as a series of multiple-choice and short-answer digital questions.

A distinctive feature of the test is that it is adaptive: the difficulty of the questions a child sees adjusts in real time based on how they're answering, so two children sitting the same test can end up seeing different specific questions depending on their performance as they go. This is designed to more precisely measure ability across the full range of candidates, rather than having a fixed paper where very able children finish comfortably early and less confident children run out of time on questions too hard for them.

The English section assesses comprehension and understanding of texts; Maths covers the expected primary curriculum content up to the relevant year group; and the two reasoning sections test pattern and logic skills in verbal and non-verbal (visual/spatial) form, similar in spirit to reasoning tests used elsewhere in the 11+ system, though with ISEB's own specific question bank and adaptive delivery.

The Common Pre-Test is most commonly sat in the autumn term of Year 6, for entry to senior school the following September (Year 7 entry), which lines up broadly with when many grammar school 11+ exams also take place. Some schools also use it, or a version of it, for Year 7 entry into Year 8, or for other entry points, so the exact timing depends on which school and which year group you're applying for.

Because the test window and exact registration process is managed by ISEB in coordination with each family's current school and the senior schools being applied to, timelines can vary, and it's worth confirming the specific dates and process directly with your child's current school and the senior schools on your list well in advance, rather than assuming a single fixed national date applies the way it might for a local authority's 11+.

The most obvious difference is delivery: the Common Pre-Test is computer-based and adaptive, while most grammar school GL Assessment tests are still largely paper-based with a fixed set of questions for every child. This changes the preparation slightly — children benefit from being comfortable navigating an on-screen test interface, not just from academic preparation, since an unfamiliar format on the day can cost time and confidence.

The adaptive nature also means there isn't a fixed bank of past papers to work through in the same way GL Assessment has, since no two children necessarily see exactly the same set of questions. Preparation therefore focuses more on building genuinely strong underlying skills across all four areas — solid comprehension and vocabulary, secure maths fundamentals, and comfort with verbal and non-verbal reasoning patterns — rather than memorising a specific format.

It's also worth knowing that for independent schools, the Common Pre-Test score is typically only one part of the overall admissions decision, alongside an interview, a school reference, and sometimes an additional school-specific assessment or scholarship paper, so a strong Pre-Test score doesn't guarantee a place on its own, and a weaker one doesn't necessarily rule a child out if the rest of their application is strong.

Because there's no fixed past paper bank, general skill-building across English, Maths, and both reasoning types tends to serve children better than narrow drilling on any one predicted question type. Reading widely, practising mental arithmetic and problem-solving, and doing regular verbal and non-verbal reasoning practice — in a format similar to what other 11+ children practise — all transfer well to the Common Pre-Test, since the underlying skills it measures overlap significantly with the broader 11+ skill set.

Getting comfortable with on-screen testing specifically is also worth a bit of dedicated practice time close to the test date, so the interface itself isn't a source of stress.

Skylark 11+'s adaptive practice platform is a natural fit here, since it works the same way the Common Pre-Test does — adjusting question difficulty to your child's level rather than working through a fixed printed paper — alongside a free diagnostic to spot gaps early, a personalised plan (a full year, or an 8-week emergency option if time is short), mock exams, and downloadable worksheet PDFs for offline practice, all for £199 a year.