Year 11 · GCSE Maths

Behind in What, Exactly?

The Year 11 maths question nobody asks, and why answering it in the next eight weeks matters more than the revision guide.

By Rayyan, BrightStrides Tutoring · September 2026 · 5 minute read

Your child just started Year 11. Somewhere in the first fortnight a teacher, a report, or your own gut has said the word behind.

And so you do what every sensible parent does. You buy the revision guide. Or you ring a tutor. Both feel like action.

Here is the problem with both. Neither of them knows where the gaps are. And in GCSE Maths that is not a detail. It is the whole game.

Why "behind" is the wrong word

"Behind" sounds like a distance. As if your child is a few miles back on the same road and just needs to walk faster.

GCSE Maths does not work like a road. It works like a building.

The Edexcel specification your child is sitting is 1MA1, the one around 60% of the country takes, and it is cumulative by design. Every Year 11 topic sits on something from Year 9 or Year 10. Ratio underpins proportion, which underpins compound measures and percentages. Solving simple equations underpins simultaneous equations, which underpins half the algebra on Paper 2.

So a child who is "behind" is almost never behind everywhere. They are standing on a floor with two or three missing planks, and every new topic the school teaches is being built on top of them.

That is why the useful question was never "is my child behind?" It is "behind in what, exactly?"

What happens when you don't ask it

Two things, and you have probably seen both.

The revision guide route. Your child starts at chapter one. They spend three evenings on place value and rounding, which they could already do, feel productive, and never reach the fractions page that was actually the problem. Revising from the front of the book is revising blind. It polishes what is fine and skips what is not.

The tutoring route. A good tutor will find the gaps eventually. But "eventually" is paid for by the hour. If the tutor walks in without a map, the first four or five sessions are them drawing one at your expense, and a parent who cannot see that map has no way of knowing whether session six is going anywhere.

Neither route is wrong. They are just out of order.

The examiners already know where the gaps are

This is the part most parents never hear about.

After every exam series, Pearson's Principal Examiners publish a report on each paper. Which questions were done well, which were not, and the specific mistake students kept making. These are public documents, and they are remarkably consistent from one year to the next.

A few examples from recent Foundation reports:

• On a straightforward area question, the examiner notes students who worked out the perimeter instead. The two ideas simply have not separated in their heads.
• On negative numbers, the recurring error is adding the sizes and picking a sign, so that minus 7 minus 5 becomes 2 or minus 2 rather than minus 12.
• On lowest common multiple, students confuse it with the highest common factor, or just multiply the two numbers together.

And from Higher: on reverse percentage questions, the examiners repeatedly flag students treating the reduced price as 100% and taking a percentage off it. It is the single most common way to lose every mark on that question.

None of these are "being bad at maths". Each is one specific, nameable, fixable misunderstanding. The examiners have effectively written the list of planks most likely to be missing. Almost nobody uses it.

Diagnose first. Then revise. Then tutor, if you need to.

You would never let a doctor prescribe before they had diagnosed. Maths deserves the same order.

The first eight weeks of Year 11, from now to October half term, are the window. The school is still teaching new content, mocks have not happened, and the tier decision between Foundation and Higher (entries are due in February) is still open. It is the one stretch of the year when finding the gaps costs you almost nothing and fixing them changes everything downstream.

What a proper diagnosis looks like:

1. Topic by topic, not a percentage. "62%" tells you nothing you can act on. "Secure on angles, shaky on fractions of an amount, and confusing area with perimeter" tells you exactly what Tuesday evening is for.
2. Skill, then application, then the trap. Can they do the bare skill? Can they use it in a one step question? And when a question is set up to catch the known misconception, do they fall for it? A child can pass the first two and fail the third. That is an Amber, not a Red, and it is fixed differently.
3. Named causes, from evidence. If the diagnosis says why a topic is weak, it should be able to say where that comes from. Where there is no evidence for a specific cause, honest reporting says "developing" rather than inventing one.
4. A priority order. Reds first, because they are foundational and everything else sits on them. Then the Ambers, ranked by how often examiners see that particular slip.

Do that, and the revision guide becomes useful, because you open it at the right page. And if you do bring in a tutor, they start on session one with the map already drawn.

Where BrightStrides fits

This is the order we built around. A student sits a short diagnostic, around 25 to 30 minutes at home, and the report that comes back is built on exactly the examiner evidence above. Every weakness it names traces to a real Principal Examiner report, never a guess. A human tutor then reads it with you, and if tuition follows, it follows the map rather than drawing one.

We think that is the only honest way to answer "behind in what?" It is also the only way tutoring money should ever be spent.