The ISEB Common Pre-Test is an adaptive computer-based test used by many independent senior schools as a Year 6 or Year 7 pre-screening assessment.
Where this format is used
The ISEB Pre-Test is used by a wide network of independent schools for entry at 11+, 12+ or 13+. It does not feature in state grammar admissions. Knowing which format your child will sit is the single most important fact to establish before buying a single practice paper, because format-specific practice is dramatically more useful than generic practice.
Paper structure & timing
The test is computer-based and adaptive: the difficulty of subsequent questions varies based on performance. There are four sections — English, Maths, Verbal Reasoning and Non-Verbal Reasoning — sat across approximately two and a half hours.
Because the test is adaptive, two children sitting on the same morning will see different questions. There is no concept of "missing" a question — every answer must be given before the next appears.
Question style & what it rewards
The style is closer to GL than to CEM, with clear question types and unambiguous wording. The adaptive engine, however, means strong performance increases the difficulty quickly — a child who finds early questions easy will be working at the edge of their ability for the bulk of the test.
It rewards composure under sustained difficulty. A child who panics when questions get hard will perform worse than a child of the same ability who treats hard questions as confirmation that they are doing well.
How to prepare for it specifically
Familiarise your child with the digital interface specifically — paper-based practice does not prepare a child for clicking through screens, scrolling through long passages, or losing the ability to flip back to earlier questions. The official ISEB Pre-Test sample materials are essential.
Practise on screen for the final month, even if paper-based practice has been the bulk of preparation. Reading on screen is meaningfully harder than reading on paper for most children at this age.
Common myths about this format
A common myth is that the adaptive engine means you only need to do well on early questions. This is wrong — the engine measures total ability across the full test, and giving up on later questions because they are hard will pull the final score down sharply.
Practical recommendations
Practical recommendation: combine GL-style paper practice for topic coverage, the official ISEB Pre-Test sample for interface familiarity, and a deliberate conversation with your child about the psychology of facing hard questions on a screen with no way back. Treat the format as a craft to be learned alongside the underlying subject material, not as a hurdle to clear once and forget about.