Why is my child struggling with maths?
Most of the time it is a missing step, not a lack of ability. Maths is built in layers, so one shaky idea from an earlier year (place value, say, or what a fraction really is) makes everything on top of it feel hard.
Find that layer, practise it a little every day, and the work above it starts to make sense again. Here is how to find it.
Why it usually happens
Few subjects stack as tightly as maths. Carrying in addition depends on place value; long multiplication depends on carrying; division depends on multiplication. Fractions lead to ratios, ratios to percentages, and all three turn up again in algebra. A gap at the bottom shows up years later as “I’m bad at maths”.
The gap then feeds itself. A child who expects to be wrong stops trying things, guesses faster to get it over with, and starts to believe they are “not a maths person”. That belief is a result of the struggle, not the cause of it, and it fades once they start getting things right again.
How to find the missing step
- Pick one topic that feels hardNot “maths”. One thing: subtraction with borrowing, fractions, word problems.
- Go back a year until it is easyGive a few problems from the class before, then the class before that, until they are quick and sure.
- Walk forward slowlyThe first place where they slow down, hesitate or start guessing is the missing step.
- Ask them to explain one out loud“Talk me through it.” You will hear the exact moment the method stops making sense to them.
Do this calmly and briefly, over a few days. It should feel like detective work you are doing together, not a test.
What their mistakes are telling you
The same wrong answer twice is rarely carelessness. It is usually a rule your child believes that isn’t quite right.
| What they wrote | What it usually means | The layer to rebuild |
|---|---|---|
| 23 + 19 = 32 | Added the ones (12) but didn’t carry the ten | Place value: 12 ones is 1 ten and 2 ones |
| 52 − 17 = 45 | Took the smaller digit from the bigger (7 − 2) in the ones | Breaking a ten into ones |
| ½ + ⅓ = ⅖ | Added tops and bottoms | What a fraction is: parts of the same-sized whole |
| 0.5 < 0.25 | “25 is bigger than 5” | Decimal places as tenths and hundredths |
| 3 + 4 × 2 = 14 | Worked left to right: 3 + 4 first, then × 2 | Order of operations, and why it exists |
What helps
Short and daily beats long and weekly
Ten to fifteen minutes most days, on the missing step. Olympiad coaches suggest 8 to 10 problems a day for a Class 3 child preparing for a contest2. For a child who is struggling, start with fewer and easier ones: the goal of the first week is to feel right again.
Hints, not answers
When they are stuck, ask a question that points the way (“what does the 1 in 12 stand for?”) rather than showing the method. A step they find themselves stays found.
A mistakes notebook
One page per mistake: the problem, what they did, and the idea they missed, in their own words. Coaches recommend it for olympiad students3, and it works just as well for children who are catching up. Coming back to the notebook a week later shows them how far they have come.
Watch the words
“Weak at maths” and “behind” stick to a child. In Kiwimath’s parent view we group topics as Strong, Practising and Building foundations, because that is what is actually happening, and it gives the child somewhere to go.
When it might be more than a gap
For a small number of children the difficulty is dyscalculia, a specific learning difficulty with numbers. Estimates put it at around 3 to 7% of children, depending on how it is defined1. Signs include real trouble telling which of two numbers is bigger, counting on fingers for very simple sums long after classmates have stopped, and little progress despite steady, patient practice.
If that sounds like your child, talk to their teacher and ask about an assessment with a specialist. A diagnosis opens up the right kind of support, and practice still helps alongside it.
How Kiwimath handles it
- It starts at their level, from the class you choose, and you can move the level down from their profile if it feels too hard.
- A wrong answer brings another question on the same idea, when there is one, before it moves on.
- At Levels 1 to 3, wrong answers get a specific note. Each wrong choice has its own explanation, so the help fits the mistake your child actually made.
- Hints come in three steps (a nudge, a strategy, a worked step) and stop short of the answer.
- A wrong answer is never shown in red, and there is no failure sound. Mistakes are part of the climb.
Sources
Checked on 27 September 2026. Numbers and dates come from these pages; the advice around them is ours.
- Butterworth, B., Varma, S. and Laurillard, D. (2011), Dyscalculia: from brain to education, Science 332
- PW Store, How to prepare for the maths olympiad in Class 3. the "8 to 10 sums a day" advice
- ioqm.in, IOQM preparation for Class 6 to 8. on keeping a notebook of mistakes
Start where it feels easy, then climb
Kiwimath starts at your child's level and steps back to an easier version of an idea when they slip, so they build the missing step instead of guessing past it.
Start at the right levelFree during early access.