Stowe School assesses its 13+ candidates differently from many of its peers. Rather than the ISEB Pre-Test, Stowe uses the CAT4 as its main academic screening, alongside a school reference and a private visit. Knowing which assessment your child will actually sit, and what it rewards, is the difference between focused preparation and effort spent on the wrong thing. This guide explains Stowe's process and how to prepare.
- Main test
- CAT4, not the ISEB Pre-Test
- For overseas pupils
- UKiset, where English is not the first language
- When
- October or November of Year 6, or Year 7 for boarding candidates
- Also assessed
- A school reference and a private visit with interview
- Decision
- Based on all elements together, not one test
Why Stowe uses the CAT4
Most senior schools screen 13+ candidates through the ISEB Common Pre-Test. Stowe takes a different route and uses the CAT4 as its main academic assessment. This matters because the two tests are not the same, and a family that prepares for the wrong one wastes effort. The CAT4, or Cognitive Abilities Test 4, is designed to measure underlying reasoning ability rather than curriculum knowledge, which shapes both what it tests and how you should prepare. Stowe sits the CAT4 in October or November of Year 6 for most candidates, or in Year 7 for some boarding applicants.
What the CAT4 involves
The CAT4 assesses four types of reasoning rather than school subjects. It covers verbal reasoning, which is reasoning with words; quantitative reasoning, which is reasoning with numbers; non-verbal reasoning, which is reasoning with shapes and patterns; and spatial reasoning, which is the ability to work with shapes and space in the mind. Because it targets reasoning rather than taught content, the CAT4 is harder to cram for than a subject exam, and it rewards children who are genuinely strong reasoners. Our dedicated guide to the CAT4 test sets out the format in full, and the summary here focuses on what it means for Stowe.
UKiset for overseas candidates
For pupils whose first language is not English, Stowe uses the UKiset instead of the CAT4. UKiset is a standardised test designed for international applicants to UK schools, and it includes an English-language component alongside reasoning. If you are applying from overseas, our guide to the UKiset test explains what it involves and how to prepare. Families based in the UK with English as a first language will sit the CAT4 route described above.
The whole assessment
The CAT4 or UKiset is only one of three elements Stowe weighs. The others are a reference and report from your child's current school, and a private visit that includes interviews and a tour. Stowe forms its view from all three together, so a child who tests well but does not come across as a good fit on the visit, or whose reference raises concerns, is not assessed on the test alone. Equally, a child who is a little below the very top on the CAT4 but interviews well and comes warmly recommended can do very well. Our guide to the Stowe interview and private visit covers that part in detail.
How Stowe uses the result
It helps to understand that the CAT4 is one input rather than a pass or fail gate. Stowe reads the result alongside your child's school reports and the impression formed at the private visit, building a rounded picture rather than ranking children purely by score. Because the CAT4 reports on different kinds of reasoning, it can also highlight a particular strength, such as strong verbal or spatial reasoning, which adds useful colour to a child's profile. The practical takeaway for families is that a single number does not decide a place at Stowe. A child who reasons well, reads widely, comes warmly recommended by their current school and engages genuinely on the visit is exactly the kind of candidate the process is designed to identify, and the CAT4 is there to support that judgment rather than override it.
How to prepare
Because Stowe assesses reasoning through the CAT4, preparation looks a little different from preparing for a subject-based exam. The most useful thing is familiarity: working through CAT4-style questions so the format holds no surprises, and building steady reasoning skill through regular, short practice rather than occasional long sessions. Wide reading still helps, because a strong vocabulary supports the verbal reasoning component, and secure number work supports the quantitative section. For the visit and interview, the best preparation is the kind that builds confidence in talking about ideas and interests, since Stowe wants to see a child who will thrive in its community. A child who is used to discussing books and ideas at home, and who has practised CAT4-style reasoning, is well placed.
Give your child the best possible shot at the Stowe assessment
Our tutors prepare children specifically for the CAT4 and the Stowe admissions process, with an approach that is targeted, calm and tailored to your child. Book a free diagnostic to see where they stand.
Book a free diagnosticWhat to avoid
The first thing to avoid is preparing for the wrong test. Many families assume Stowe uses the ISEB Pre-Test like its peers and prepare accordingly, only to find their child sits the CAT4. Confirm the format early and prepare for the right one. The second is trying to cram for the CAT4 as though it were a subject exam. Because it measures reasoning, familiarity and steady practice work far better than last-minute content revision. The third is treating the test as the whole assessment, when in fact the reference and the private visit carry real weight alongside it.
