Somewhere in Year 6 or Year 7, a child on the 13+ route sits down at a screen and takes the test that will do most of the deciding. Not the famous one — not Common Entrance, with its rows of desks and its subject papers — but a quieter, stranger thing: an online, multiple-choice, adaptive test called the ISEB Common Pre-Test, sat once, with the result shared across every senior school the family has applied to.
Parents worry about the pre-test in a particular way, and the worry usually attaches to that word "adaptive". A child comes out saying "it got really hard at the end" and a parent hears failure. In an adaptive test it usually means the opposite. This article explains the test plainly — what it is, what is in it, and what adaptivity actually does — so that neither you nor your child mistakes the test's design for a verdict.
What the pre-test is, and where it sits in the process
The ISEB Common Pre-Test is the standard first-stage assessment for entry to independent senior schools at 13+ (and it is used by some schools for 11+ entry too). It is:
- Online and multiple-choice. No writing, no working shown, no examiner reading a script. The child selects answers on a screen.
- Sat in Year 6 or Year 7, depending on when the senior schools on your list test. Most children sit it at their own school, in familiar surroundings, on an ordinary school day.
- Sat once per cycle. This is the design feature that gives the test its name — it is common across schools. One sitting; every registered senior school sees the result. Your child does not do the whole thing again for each school on the list.
- The main input to the conditional offer. Alongside the current school's report and, at many schools, an interview, the pre-test result is where most of the actual selection in the 13+ system happens — the landscape piece explains that structure.
The whole test takes in the region of two and a half hours, but it is not sat as one block: the sections are separate, and schools commonly spread them across more than one sitting so that no ten-year-old faces the full span in an afternoon.
The four sections
English
Reading comprehension, spelling, punctuation and grammar, drawn from the sort of English a child does at school. A passage to read and questions about it; sentences to complete or correct. A child who reads widely and has been taught the curriculum properly is prepared for this section by their ordinary schooling.
Mathematics
Curriculum mathematics — number work, fractions and proportion, shape, simple algebra and problem-solving — pitched around what a child of this age has met at school. As with English, the content is not exotic; the challenge is fluency, doing familiar things accurately at a reasonable pace, on a screen, without jottings marked by anyone.
Verbal reasoning
Verbal reasoning (VR) is where the test leaves the school curriculum. VR questions work with words and logic as puzzles: relationships between words, odd-ones-out, letter codes and sequences, hidden words, logical deductions from short statements. No school subject teaches this, which is precisely the point — it is intended to look at how a child handles unfamiliar material, not what they have been taught.
Non-verbal reasoning
Non-verbal reasoning (NVR) does the same with shapes instead of words: sequences of figures, matrices with a missing cell, rotations and reflections, finding the rule that connects a set of patterns. Again, it is not a school subject and is not meant to be one.
We should be straightforward here, since we are a tutoring company writing about a test: our tutors do not teach verbal or non-verbal reasoning. We teach curriculum subjects — the English and maths that the first two sections draw on — and nothing we offer prepares a child for the VR and NVR sections. Plenty of published practice material exists for reasoning question types; familiarity with the formats is worth having, and it is not something you get from us.
What "adaptive" actually means
An adaptive test adjusts its difficulty in response to the child's answers. Answer correctly and subsequent questions get harder; struggle and they ease off. Over the course of a section, the test homes in on the level at which the child works — which locates their performance far more efficiently than a fixed paper, where a strong child wastes time on questions far beneath them and a struggling child faces a wall of questions far above.
That is the whole mechanism. But its consequences for the child's experience are what parents most misunderstand, so let us spell them out.
Feeling stretched is the test working
A fixed paper lets a strong candidate cruise: lots of easy questions, a comfortable feeling, a high score. An adaptive test never lets anyone cruise. However able the child, the test finds its way to questions near the edge of what they can do and keeps them there — because the edge is what it is measuring. Every child, including the strongest, spends much of an adaptive test on questions that feel hard. A child who walks out saying "it got really difficult" has described the design, not their result.
Tell your child this before the day, in exactly these terms: the test is supposed to feel hard, and it feels hard when you are doing well. It is the single most useful piece of preparation there is, and it costs nothing.
Children cannot compare tests afterwards
Two children in the same room sit materially different tests — different questions, different difficulty paths. So playground post-mortems ("did you get the one about—?", "mine was so much easier") are meaningless, and a child who concludes from one that they have done badly is reasoning from noise. Worth saying to your child in advance, because they will have the conversation anyway.
Getting stuck does not sink the test
In a fixed paper, a bad patch — three questions missed in a row — is simply lost marks. An adaptive test responds: it eases the difficulty, lets the child regain their footing, and works back up. A wobble in the middle is absorbed, not compounded. Children who know this panic less when a hard question lands.
The scores are age-standardised
Results are adjusted for the child's age at sitting, so an August-born child in Year 6 is not penalised for being nearly a year younger than a September-born classmate. Combined with adaptivity, this is why the sensible parental posture is calm: the test is engineered, more carefully than most things a child meets, to find a fair level rather than to catch anyone out.
What sensible preparation looks like
The pre-test resists cramming by design — that is what finding-a-level means. But "you can't cram for it" does not mean "do nothing". Three things genuinely help:
- Steady curriculum work in English and maths. Half of the test is curriculum material, and fluency in it is built the ordinary way: reading, practice, gaps found and closed, over months rather than weeks. This is the unglamorous work that moves the sections that can be moved. It is also, for what it is worth, the part where our tutors live — KS3-facing subject teaching, with an exam date the whole plan counts down to — though a Year 5–6 child's everyday schoolwork serves the same end.
- Format familiarity. A child should not meet adaptive on-screen multiple-choice for the first time on the day, and should have seen the VR and NVR question types often enough that the formats are recognisable. Familiarity is a modest, real gain — a few sessions' worth, not a course.
- The adaptive briefing. Explain, once, what adaptivity means: hard is normal, comparing is pointless, a wobble self-corrects. A child who understands the machine sits it calmer, and calm is worth marks in any test.
What does not help: months of reasoning drills chasing a score the test is built to resist, or an anxious household treating a Year 6 assessment as a verdict on a child's future. The schools reading the result will also read a school report and often meet your child; the pre-test is the largest single input, not the whole picture.
What schools do with the result
Each senior school sets its own bar and weighs the pre-test in its own way alongside the report and interview. Some schools also run their own further assessments in Year 7. What follows, for successful candidates, is the conditional offer — and then the long, oddly quiet stretch before the Year 8 exams, which is mapped in the 13+ timeline.
FAQ
What does 'adaptive' mean in the ISEB Common Pre-Test?
The test adjusts question difficulty as the child answers: get questions right and they get harder, struggle and they ease off. It means every child spends most of the test working near the edge of what they can do — so feeling stretched is a sign the test is working, not a sign of failure.
How many times is the ISEB pre-test sat?
Once per admissions cycle. The result is shared with every senior school the family has registered with, so a child does not sit it separately for each school — though a few schools run their own additional assessments.
What are the four sections of the ISEB pre-test?
English, mathematics, verbal reasoning and non-verbal reasoning. English and maths draw on the school curriculum; the two reasoning sections use puzzle-like question types — word relationships and codes in VR, patterns and shapes in NVR — that are not taught as school subjects.
Can my child fail the pre-test by getting hard questions?
Reaching hard questions is what happens when a child is doing well — the test feeds harder material to stronger performances. A child who comes out saying it was difficult has told you nothing bad. Scores are also age-standardised, so younger children in the year group are not disadvantaged.
Should we prepare for the pre-test, and how?
Sensibly, yes: steady work on curriculum English and maths, and enough familiarity with the format that the screen and the question styles are not a surprise on the day. What does not help is months of drilling — the test is designed to find a level, not to reward cramming.