Guide for parents · September 2026
Private maths tutoring and the prerequisite chain
Maths is the subject where the gap is never where the trouble is. Why a weekly maths tutor often works on the wrong topic, and what to do first.
Maths is the subject where the trouble is never where it looks
Every subject has prerequisites. Maths is the one where they are strict. You cannot do ratio without fractions, you cannot do fractions without division and place value, and you cannot do algebra without knowing what an operation means rather than how to perform it. Miss a link and everything built on it becomes guesswork that happens to be right sometimes.
This is why maths tutoring goes wrong in a specific way that English or history tutoring does not. The parent reports the symptom — ratio, percentages, equations — and the hour gets spent there, on top of the hole, week after week. The child improves at that topic while it is being practised and collapses again the moment the class moves on, because the thing holding them up was never the topic.
The chain, and the point where a child usually drops off it
| What the class is doing | What it silently assumes | The classic wrong answer |
|---|---|---|
| Adding unlike fractions | Lowest common multiples, equivalence | Adding the denominators |
| Percentage of an amount | Place value, division by ten | Losing track of the decimal point |
| Ratio | Fractions, multiplicative thinking | Adding instead of scaling |
| Simplifying expressions | What a letter stands for | Collecting unlike terms |
| Solving an equation | Simplifying, substituting, inverses | Doing one side only |
A maths tutor who is good at diagnosis will work down this chain in the first session. Many will not get the chance, because the parent has described a topic and the homework is on the table.
What a private maths tutor is genuinely better at
Three things, and they are not small.
Watching a child think. A tutor sitting beside a child sees the pause before the pen moves, the rubbing out, the number written and abandoned. Most maths errors are diagnosed from the working, not the answer, and a person in the room reads working live.
Explaining an abstraction for the first time. The moment a letter starts standing for a number, or a minus sign starts meaning direction rather than subtraction, a human who can rephrase four different ways until one lands is worth a great deal.
And exam craft. Method marks, laying out working so a wrong answer still scores, knowing what a question is asking for. That is specification knowledge and a tool without a specification does not have it.
What Pobbi does instead, precisely
The learning check is twenty questions drawn from a bank covering eighteen maths skills, pitched at Year 5 to Year 9. It runs about twelve minutes, it is free and it does not ask for a card. It deliberately reaches below the child's year, because the point is to find where the chain broke, not to grade this term.
The mechanism worth knowing about is what happens after a mistake. The check holds an explicit map of which skills sit beneath which. Get the sum of one third and one quarter wrong and it tests three specific things: lowest common multiples, equivalent fractions, and adding fractions that already share a denominator. Get a two-step equation wrong and it tests simplifying an expression and substituting a value. Get a subtraction of unlike fractions wrong and it tests unlike addition and equivalence.
That produces a list rather than a mark. Each skill comes back secure at eighty per cent or above, still being practised between fifty and seventy-nine, or still being learned below fifty. Practice then begins at the lowest insecure link, and a wrong answer produces a hint, a smaller sub-question or a worked comparison, because handing over the answer ends the thinking that was about to happen.
Being straight about the limits
There is nobody on the other end. Pobbi cannot see your child's working on paper, cannot notice that they have gone quiet, and cannot talk them through a brand new idea the way a person can. It holds no exam board specification and does not claim to cover the national curriculum in full — in England that curriculum binds maintained schools while academies organise it their own way, and Scotland, Wales and Northern Ireland have their own.
For a child preparing for GCSE, for a child with a diagnosed difficulty with number, or for a child who has decided they are bad at maths and needs an adult to change their mind, a teacher or tutor is the better answer. The most useful thing Pobbi can do in those cases is tell that person where to start.
Questions about maths tutoring
My child gets the method right and the answer wrong. Tutor?
Look at times tables and place value first. That pattern is usually arithmetic fluency eating the attention the method needed, and it is fixed by short daily repetition rather than by explanation.
Is it worth tutoring a child who is doing fine?
If they are doing fine by reproducing procedures, the wobble is coming and earlier is cheaper. Test whether they can explain why a method works, not whether they can run it.
Should the tutor use the school's method?
Ideally yes, at least at first. A second method for the same operation, introduced while a child is unsure, usually adds confusion rather than choice.
Can practice at home really replace a maths tutor?
For fluency, for foundations and for consistency, often. For live explanation and exam technique, no.