CEM Select and Cambridge Insight Assessment for parents

If you've been reading about UK independent school entrance tests, you'll have run into the name CEM Select. In early 2025, the assessment was rebranded as Cambridge Select Insight. It's the same family of tests, run by the same team at the University of Cambridge, but with a new name and some refinements.

This guide explains what Cambridge Select Insight (still often called CEM Select in conversation) is, what it tests, how it differs from the more widely used ISEB Common Pre-Test, and which schools currently use it for 11+ or 13+ admissions.

Cambridge Select Insight is a one-hour, computer-based test used by a smaller group of selective independent schools. Around 23 schools currently use it, alongside or instead of the ISEB Pre-Test. It tests verbal ability, numerical ability and non-verbal ability. Unlike the ISEB Pre-Test, it isn't adaptive: every child sees the same questions in the same order, and they can review previous answers within each section.

The test is designed to measure underlying academic potential rather than what a child has been coached to memorise. Whether it succeeds at that more than other tests is a separate debate, but the design intent matters because it shapes the question style.

Cambridge Select Insight runs for one hour and is split into six sections, each with its own time limit. The interface uses a few different answer formats: multiple choice, drag-and-drop and auto-complete (typing letters into a gap). Pencil and paper are usually allowed for working.

Two variants exist for independent schools: an 'Evaluate' version that stays the same year on year (for cohort comparability) and a 'Challenge' version that rotates between several papers (so the same school can use a fresh paper each year). For many parents this distinction won't matter; the school decides which version your child sits, and the experience is similar either way.

The two tests look similar on paper, but the design choices are different in ways that matter for preparation.

The biggest practical difference for your child is the review-answers point. Because Cambridge Select Insight isn't adaptive, your child can go back within a section if they spot they've made a mistake or want a second look. The ISEB Pre-Test locks each answer in. For some children, the ability to review reduces anxiety. For others, it just adds time pressure because they end up second-guessing.

The smaller school base also matters. If your child is applying mainly to schools using the ISEB Pre-Test, the Cambridge test may not come up at all. If you're aiming for one or two of the schools that use Cambridge Select Insight, it's worth understanding the format properly.

The exact list shifts year to year, but the schools most commonly associated with Cambridge Select Insight (formerly CEM Select) for 2026 entry include a mix of London girls' schools, partially selective independents, and one or two of the most academically selective day schools.

Cambridge Select Insight returns age-standardised scores to schools within 72 hours of the test. The scoring works on the same principle as other standardised tests: a normal distribution, scores adjusted for the child's age in months, comparison made against a representative sample.

The school sets the threshold. Some use the score as a sift to invite the strongest applicants to interview; others use it as one signal among many. Parents don't usually receive the score directly. As with the ISEB Pre-Test, the most you'll typically see is the school's eventual decision.

Two principles, both honest. First, the test is designed to measure underlying ability rather than reward heavy coaching. Massive amounts of drilling won't move the score as much as parents sometimes hope. Second, familiarisation still helps. A child who knows what drag-and-drop and auto-complete questions look like, and who has done a couple of timed run-throughs, is at less of a disadvantage than one walking in cold.