Why is my child struggling with math?

When a child of 6 to 12 struggles with math, the first place to look is a gap in an earlier fact or method, not a lack of ability. A 15-minute check at the kitchen table can show you which kind of struggle you are looking at, and what to try first.

12 minute read · Updated October 9, 2026

You may recognise this. Your child reads well and can explain the rules of a board game in alarming detail. Then a page of subtraction comes home and it all falls apart. The answers are wrong in ways you cannot follow, and nobody has told you why.

"Struggling with math" is not one problem. It is at least seven, and they need different help. This guide lists them in the order worth checking and gives you a short way to tell them apart at home.

What are the common reasons a child struggles with math?

The common reasons a child of 6 to 12 struggles with math are a gap in an earlier fact or method, a method not yet understood, slips when there is too much to hold in mind, trouble reading the question, worry, eyesight or attention, and, less commonly, a specific learning difficulty. Several can be present at once.

No study we read ranks these causes by how often each occurs. The order here is practical: check the quick, fixable things first.

How can I tell which one it is? A 15-minute home check

You can narrow it down with a 15-minute home check: five short tasks at the kitchen table, each built to separate one cause from another. Pick a calm time, not homework time, and do not correct anything until it is over.

This is a simple home check, not an assessment. It cannot tell you whether your child has a learning difficulty, an attention difficulty or anxiety. It shows you where to look first and gives you something specific to show the teacher.

Write down what happened, with the actual wrong answers. Then:

Is it a gap in an earlier fact or method?

A gap in an earlier fact or method is the first thing to check, because later math is built on earlier math. A child who still works out 7 × 8 has little attention left for long division. England's schools inspectorate, Ofsted, says pupils who cannot quickly recall facts "struggle with calculations due to their working memory being overloaded".

The Education Endowment Foundation adds that such pupils are likely to "have difficulty understanding and using mathematical concepts they encounter later on". For reference, the US Common Core standards expect children to know from memory all sums of two one-digit numbers by the end of Grade 2 and all products of two one-digit numbers by the end of Grade 3. England's national curriculum expects addition and subtraction facts to 20 to be recalled fluently in Year 2, and the tables up to 12 × 12 memorised by the end of Year 4. Full lists are in math by grade.

What to do. Find the last place where things were solid and start there. Practice a few facts at a time, mixed with ones they already know: a US federal practice guide for children who struggle recommends "a mix of previously and newly learned material". See why times tables don't stick and counting on fingers.

Is it a method they have not understood yet?

A method not yet understood shows as the same wrong answer pattern again and again, produced without hesitation. The child is not careless: they are carefully following a rule that is slightly wrong. The Education Endowment Foundation calls this a misconception: "an understanding that leads to a 'systematic pattern of errors'".

Take subtraction with regrouping (borrowing, or exchanging). Asked for 52 − 27, a child who has learned "take the small one from the big one" does this:

    T  O
    5  2
  - 2  7
  ------
    3  5

The method as taught regroups one ten into ten ones first:

    T  O
    4 12
    5  2
  - 2  7
  ------
    2  5

What to do. The same guidance says misconceptions should be "uncovered and addressed rather than side-stepped or ignored". "Take one from the 5" means nothing unless the 5 is known to be five tens, so lay out 52 as five bundles of ten and two singles (straws or coins) and take 27 away by hand. A US federal practice guide gives "regrouping with base 10 blocks" as its example of a concrete model, and recommends "single-digit or easy-to-process numbers" while a method is new. Then write it. More in carrying and borrowing mistakes and new math methods explained.

Is it slips under load?

Slips under load are mistakes a child can find and fix when asked to look again. They change from one sum to the next: a carried digit forgotten here, a digit miscopied there. The child understands the method, but there is too much to hold in mind and something drops.

Take 48 + 37. The child says "8 and 7 is 15", writes the 5, forgets the carried 1, and writes 75 instead of 85. Asked to check, they spot it at once.

What to do. "Be more careful" does not work, because care is not what ran out. Take weight off. Quicker facts help: the same federal guide says automatic retrieval "gives students more mental energy" for multistep procedures. Use squared paper so columns line up, write the carried digit every time, and estimate first ("about 50 and about 40, so about 90"). When there is a mistake, do not point to it: the guide suggests questions that help children "self-identify where their thinking went wrong". More in careless mistake or real gap?.

Is it reading the question?

Sometimes the math is fine and reading is the obstacle. If your child answered the word question correctly when you read it aloud, but not when they read it alone, the struggle is with getting the question off the page. Extra sums will not fix that.

We found no research on this in the sources we read, so this is a suggestion. Have your child read the question aloud, say in their own words what is asked, and underline the numbers before writing anything. If reading is hard work in other subjects too, tell the teacher.

Is it worry?

Worry about math can make a capable child look as if they cannot do it. The Education Endowment Foundation says math anxiety can harm learning "by overloading their working memory or causing them to avoid mathematics". One University of Chicago study found high math anxiety going with weaker results even among first and second graders with strong working memory.

The sign in the home check is a child who knows things in conversation and loses them once it feels like a test. What to say and what to avoid is in math anxiety in children.

Could it be eyesight or attention?

Eyesight and attention are worth ruling out, because both can look like a math problem. A child who cannot see the board clearly miscopies digits. A child who loses focus partway through a long sum drops a step. Neither is about understanding, and a parent cannot judge either alone.

Reasons to book an ordinary eye test: squinting, holding the page close, or miscopying from a distance. For attention, notice whether the same thing happens outside math: all homework taking far too long, steps lost in any long task, and the teacher seeing it too.

One study of children seen at a clinic for ADHD found that some also met the criteria for a mathematics disorder, though a clinic group says nothing about children in general. If what you see worries you, describe it to the teacher and your pediatrician or family doctor.

What about dyscalculia?

Dyscalculia is a specific learning difficulty in mathematics, and only a qualified professional can assess it. That usually means an educational psychologist or similar specialist, reached through the school or your doctor. No home check, website, teacher's hunch or app can tell you whether your child has it.

It comes last here because the causes above are quicker to check and to fix. We give no figure for how common, because the estimates depend heavily on which definition is used. One UK study found that children who met the criteria for a specific learning difficulty in math were far less likely to have had it formally identified than children with dyslexia. So asking is not being pushy.

These are reasons to ask the school about an assessment. None of them, alone or together, means your child has dyscalculia:

• The difficulty is with number in particular. Reading and other subjects are going fine.
• It has lasted a long time, across more than one school year and more than one teacher.
• Methods that were taught and practiced are gone again weeks later, repeatedly.
• Steady, well-aimed help at home and at school has made little difference.

When and how should I ask the school for help?

Ask the school as soon as you have something specific to show. Do not wait for a parents' evening. Three weeks of the right fix at home with little change is reason enough. A teacher can do far more with "she writes 35 for 52 − 27 every time" than with "she's struggling".

While you wait, keep practice short and let your child correct their own mistakes straight away. As the federal practice guide puts it: "Correcting misunderstandings early can prevent the confusion from becoming an enduring problem." More in how to help your child with math.

Where Plusy fits

Plusy is a practice app for whole-number arithmetic and fractions. It cannot assess a child or identify a learning difficulty, an attention difficulty or anxiety. Where it can help is with the first three causes here: gaps, a faulty method, and slips.

• It names the step that went wrong. When a column question is worked in the boxes and the answer is wrong, Plusy says what happened in one sentence, such as You forgot to add the carried 1:. See what happens after a wrong answer and column questions.
• Missed questions come back. A question answered wrong returns once later in the same round. When the same kind of mistake has turned up three times in a week, a short practice set on it appears on Home.
• You can see the pattern. On the You tab, the Grown-ups card has a Still practising: line naming the skills your child has slipped on, and a Mastered: line for the ones they have since got right on two different days.

Every step in this guide works with paper and a pencil. To try Plusy alongside, start free.

The one thing to remember: before you ask "why can't they do math?", ask "which exact question goes wrong, and does it go wrong the same way twice?"

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