What a standardised score actually means

A score, not a mark

Most tests a child sits at primary school give a mark: eighteen out of twenty, and everyone understands it. The Entrance Assessment does not work that way. Results are reported as a standardised score, and the number your family receives is not the number of questions answered correctly.

That catches many parents out in January, so it is worth understanding in advance.

What standardising does

Standardising converts a raw mark into a score on a common scale, so that results mean the same thing regardless of which paper was sat or how hard that paper turned out to be.

This matters because no two papers are ever exactly equal in difficulty. If one year's paper is slightly harder, raw marks across everyone sitting it fall — and without standardising, that cohort would look worse than the year before through no fault of its own. Standardising removes that distortion by describing how a child did relative to everyone else sitting the same thing, rather than in absolute marks.

Why age is adjusted for

Within a single school year group there is nearly twelve months between the oldest and youngest child. At ten and eleven, that is a meaningful gap in development — and it has nothing to do with ability or effort.

Age standardisation accounts for it. A child's performance is compared against others born around the same time, so a summer-born child is not quietly penalised for being younger than a classmate born the previous September. It is a fairness mechanism, and it is worth explaining to a child who is young in their year and worried about it.

What this means in practice

Do not try to convert a score back into a mark. It does not work that way, and the attempt only produces anxiety.
Practice scores are not predictions. A percentage on a practice paper at home has not been standardised against anything, so it cannot be compared to a real result. Use it to spot weak topics, not to forecast an outcome.
Being young in the year is accounted for. If your child is a summer birthday, this is the part of the system designed with them in mind.

What to actually watch during preparation

Since a practice percentage is not a prediction, it is more useful to watch things that genuinely indicate progress:

Accuracy by topic, and whether the weak ones are improving. One number across a whole paper hides everything useful.
Whether they finish. Running out of time is a technique problem, not a knowledge one, and it is fixable.
Whether the same mistake keeps recurring. A repeated error is a gap; a scattered one is usually just a bad day.

Scores are issued to families in January and form part of a post-primary school application. They are one input into that process — not a verdict on a child.