Learning difficulties such as dyscalculia, along with conditions like ADHD, can affect how children process and retain information and maths is often one of the first subjects where the impact becomes visible.
If your child is working hard but making little progress in maths, or if maths has become a source of distress, it may indicate something more than a simple knowledge gap.
Dyscalculia, dyslexia, dyspraxia, maths anxiety, ADHD and knowledge gaps can look similar on the surface, but they have different causes and usually benefit from different kinds of support.
Learning difficulties and related differences are conditions that can affect how the brain processes information. They are not a reflection of intelligence and they do not respond to effort or repetition alone.
The 4 most commonly identified include:
Dyscalculia
Dyslexia
Dyspraxia (Developmental Coordination Disorder)
ADHD
→ Dyscalculia is a specific learning difficulty that affects how a child understands numbers, quantities and mathematical concepts. Research published by the British Dyslexia Association highlights the impact of dyscalculia, which independent scientific studies estimate affects roughly 3–7% of children, about as prevalent as dyslexia, but far less widely recognised in UK schools. Many children reach secondary school without any formal identification.
→ Dyslexia is primarily a literacy difficulty, but some children with dyslexia also experience working-memory or processing-speed challenges that can affect maths, especially word problems and multi-step tasks.
→ Dyspraxia, or developmental coordination disorder, can affect motor coordination and sometimes visual-spatial organisation, which may make written maths work harder to manage.
→ ADHD can affect attention, working memory and impulse control, which may make maths work less consistent from one task to another.
These conditions frequently co-occur, which is one reason they can be hard to identify in a busy classroom. A child may have more than one and the patterns can overlap in ways that make the root cause hard to identify.
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Learning difficulties, knowledge gaps and maths anxiety are three different problems with three different causes. Treating one as another is the most common reason well-intentioned support doesn't work.
→ A knowledge gap can form when a child misses, forgets or never fully secures a concept when it is first taught. Progress is visible and it tends to stick.
→ A learning difficulty affects how a child processes information, so the same type of error may persist even after practice. Practice and repetition alone don't close the gap, because the difficulty is in the processing, not just the content. The same errors reappear across different topics and different years.
→ Maths anxiety is a separate but related issue that can reduce confidence and make existing difficulties harder to manage. It is an emotional response, and it tends to develop after a period of unexplained difficulty. Anxiety can mimic or amplify the signs of a learning difficulty, which is why it's important to consider all three possibilities rather than treating them as interchangeable.
If you're seeing persistent difficulty that doesn't respond to extra practice, you should be asking whether something more than a knowledge gap is involved.
A student works through a knowledge gap step by step, the kind of progress that builds real confidence over time.
The most telling signs involve number sense, the ability to understand what a number represents and how quantities relate to one another.
The National Curriculum for England builds number concepts step by step, so early difficulties can become more noticeable as later topics depend on earlier understanding.
Subitising is the innate ability to visually recognise a small group of objects without counting them individually. For example, seeing four dots on a dice and knowing immediately it's four, without pointing and counting. Difficulty with subitising may be one sign to watch for, but it is not enough on its own to indicate dyscalculia.
We recommend showing your child a small group of objects (say, five coins) and covering them quickly. Can they tell you how many without counting? Consistent difficulty with groups of three or four, well into Year 2 or Year 3, should be noted. On its own, it's not diagnostic, but alongside other signs, it matters.
Your child can write the number 7 and recognise it on a page, but has no feel for what seven objects represent. The symbol and the quantity exist as separate, disconnected pieces of information.
One way to test the connection at home is to ask your child to count out seven pieces of pasta and then ask, "So how many is that?" Uncertainty about the answer, or counting all over again, suggests the connection between symbol and quantity isn't yet secure. This is a foundational concept that underpins almost all primary maths.
Addition bonds and times tables require a form of automatic recall that children with dyscalculia often find genuinely hard to develop, not through lack of effort or practice, but because the memory processing required works differently for them.
The Year 4 Multiplication Tables Check (MTC) is a common flashpoint. The DofE's format gives children just 6 seconds per response. For children whose recall of number facts is slow or inconsistent because of processing differences, working memory difficulties, or anxiety, this timed format can reveal gaps that aren't visible in untimed classroom work. Low MTC scores can reflect any of these causes, which is why a score alone doesn't tell you what's driving the difficulty.
If your child scored poorly on the MTC, ask the teacher whether the difficulty is consistent across all table facts or clustered around certain numbers. A child who struggles specifically with 6, 7 and 8 may have a different profile from one who struggles across all tables. Either way, it should be determined whether the difficulty is responding to practice or staying flat.
Your child may not grasp why the position of a digit changes its value. For example, that 52 and 25 are different numbers, or that the 3 in 307 represents 300, not 3. Place value underpins almost every written calculation method introduced from Year 2 onwards, including column addition, subtraction with exchanging, long multiplication and decimals.
What you can do is ask your child what the digit 4 represents in the number 403. Persistent confusion here, especially if it does not improve with teaching and practice, can affect progress across many topics. Difficulty with place value that doesn't improve with practice should be raised specifically with the teacher.
Counting on fingers is entirely normal and expected in KS1. By Year 3 or Year 4, most children have developed enough automatic recall to handle small calculations mentally. Continued finger counting for basic addition and subtraction beyond this point may suggest that number facts are not becoming secure.
The recommended action is to watch how your child handles simple additions like 7 + 5 or 8 + 3. If they consistently use fingers, count from 1 rather than counting on, or take noticeably longer than you'd expect, mention it to the class teacher. Taken alongside other signs, it adds to the picture.
Numbers written in the wrong column, difficulty tracking where they are in a multi-step method, working that starts correctly but loses the thread partway through. This pattern can reflect spatial processing difficulties associated with dyspraxia or ADHD, or it can indicate that the underlying structure of written maths hasn't been fully internalised.
Look at your child's maths book and look for these: consistent misalignment of columns, repeated crossing out and methods that seem to restart mid-problem. If your child gets the right answer but can't show their working clearly, they may be holding a fragile process together through effort alone.
Your child reads fluently, expresses ideas clearly and manages well across most of the school day, but cannot reliably add single-digit numbers or recall basic number bonds. A clear gap between maths performance and performance in other subjects can be a useful signal.
What you can do is raise it with the teacher directly, and ask whether they have noticed the same gap in the classroom. A child who is clearly capable in other areas and consistently struggling in maths deserves a specific conversation, not a general reassurance.
The KS2 SATs in Year 6 can be a point where previously hidden difficulties become more obvious. The timed, mixed-format Arithmetic and Reasoning papers remove the support structures that can keep a processing gap hidden during normal class work.
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By secondary school, some children with unidentified dyscalculia may have developed coping strategies, but the move to KS3 can expose gaps more clearly. Algebra, ratio, proportion and negative numbers in Year 7 require exactly the kind of abstract number reasoning that dyscalculia makes hardest.
Your child still doesn't have a reliable recall of times tables or addition bonds in Year 7 or Year 8. This matters more at secondary school because fractions, decimals, percentages, ratios and algebra all rely on fluent recall of basic number facts. Without it, your child is solving two problems simultaneously: the new concept and the basic arithmetic it requires.
You can ask your child to recall a few simple facts (7 x 8, 6 x 9) and note how long it takes and how confident they seem. Slow, effortful recall at secondary age, alongside difficulty in the topics listed above, points towards a processing difficulty rather than a knowledge gap that practice can close.
Your child understands each step of a problem when it is broken down and explained one piece at a time, but loses the thread as soon as they have to hold multiple steps in sequence independently. This is a working memory difficulty and it is associated with ADHD, dyslexia and dyscalculia.
At this point, ask your child to talk you through how they solved a problem. If they can explain each step but not connect them into a coherent method, working memory is likely a factor. Mention this specifically to the maths teacher, as it changes how support should be structured.
Charts, tables, scatter graphs and other data representations are a significant part of the KS3 and GCSE maths curriculum and they require spatial reasoning and the ability to extract numerical relationships visually. Children with dyspraxia or dyscalculia often find this particular area disproportionately difficult.
What you can do is look at recent maths work and check whether data and statistics questions are consistently weaker than other areas. A specific, localised difficulty with visual representations, rather than a broad maths struggle, can point towards spatial processing as a contributing factor.
Your child may struggle to tell the time on an analogue clock, handle change confidently, estimate journey times, or measure ingredients. These everyday applications draw on the same number processing that underlies classroom maths. Difficulty outside the classroom can suggest that the problem is broader than a single lesson or topic, but it does not by itself identify the cause.
Pay attention to how your child manages everyday situations involving numbers, money and time. If these feel harder than you'd expect for their age, mention it to the teacher as part of a wider picture, not as an isolated concern.
Your child manages familiar problem types adequately but falls apart when the same concept appears in a different format, a different context, or alongside unfamiliar vocabulary. This points to surface-level procedural learning rather than genuine understanding, which is a pattern associated with several learning difficulties, including dyscalculia.
Ask your child's teacher how they perform on novel questions compared to practised problem types. A consistent drop in performance on unfamiliar presentations is a meaningful signal, and it points towards the kind of depth-first, concept-led support that structured programmes can provide.
Persistent withdrawal from class participation, disproportionate frustration before or during maths work, low confidence specific to maths and resistance to maths-related tasks at home.
These emotional signs cross both age groups but tend to intensify at secondary school, as the gap between your child and their peers becomes harder to hide. They become most acute as GCSE maths approaches. Maths is a compulsory qualification in England, graded 9–1 and children with unidentified or unsupported learning difficulties face real consequences in Years 10 and 11.
Avoidance and distress should be taken seriously in their own right, separate from academic performance. Raise them with the teacher and if the pattern is persistent, with your GP or the school's SENCO (Special Educational Needs Coordinator). Emotional signs alongside academic ones are often what finally prompt a formal assessment.
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Act on what you're seeing. Don't wait for school to raise it first.
Ask where marks are being lost and whether the difficulty is consistent across question types.
Then ask whether earlier curriculum benchmarks are secure. Don’t skip this question, as it's the one that points most directly towards useful action.
Note which situations cause difficulty, how long the pattern has been visible and whether it is consistent across settings. Specificity helps when speaking to a teacher or a specialist.
If dyscalculia is suspected, an assessment by an educational psychologist or other qualified professional is an appropriate next step. NHS waiting lists are long across most of England and many London families access assessments privately.
A proper assessment should consider vision, hearing and other contributing factors and use standardised testing to clarify what is driving the difficulty.
Unidentified difficulties compound. The further your child falls behind before the root cause is found, the more knowledge gaps and maths anxiety build alongside it.
A Mathnasium instructor works alongside a student, adapting explanations and teaching methods to help maths make sense.
Your priority is watching your child build confidence in something they're working hard at. In schools across Clapham, including Bonneville and Macaulay, the pace of the classroom can make an unidentified difficulty harder to spot and slower to address. The earlier the root cause is identified, the more options you have.
Mathnasium is a maths-only learning centre dedicated to helping students in Years 1–11 build confidence and close knowledge gaps at every level. When the root cause of a difficulty is hard to read, the right starting point is understanding exactly where your child stands.
Every student begins their Mathnasium journey with a diagnostic assessment that pinpoints which skills are solid and where the knowledge gaps lie.
From there, our specially trained instructors build a personalised learning plan and work through it with your child face-to-face in a small-group environment, using the Mathnasium Method™, our proprietary teaching approach.
Our instructors understand both the technical and emotional sides of learning maths. Every child moves through the programme at their own pace, with instructors there to offer encouragement, adjust the approach and explain concepts in ways that stick.
Using the Mathnasium Method™, they draw on verbal, visual, mental, tactile and written techniques so your child can approach each concept from the angle that makes most sense to them.
Parents report measurable results:
94% of parents report an improvement in their child's maths skills and understanding
93% of parents report their child's improved attitude toward maths after attending Mathnasium
90% of students saw an improvement in their school grades
With over 1,250 centres worldwide, including 40 across the UK, there's likely a Mathnasium near you.
Mathnasium of Clapham serves families across Clapham, Balham, Battersea, Wandsworth and other nearby communities who trust our centre to help their children catch up, keep up and get ahead.
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The signs described here are based on established research and are intended to help you recognise patterns and ask better questions; they are not a substitute for professional assessment. Poor maths performance can have several overlapping causes, including working memory difficulties, visual-spatial processing challenges and maths anxiety, which is why a formal evaluation by an educational psychologist or other qualified professional is the appropriate next step if you have concerns.
Mathnasium of Clapham is a math-only learning centre for K-12 students in London, . Trusted by over a million parents, Mathnasium uses personalized learning plans and the proprietary Mathnasium Method™ to help students catch up, keep up, and get ahead on their math journey.
Our specially trained tutors deliver face-to-face instruction in a supportive and fun small-group environment, working with students both in centre and online to develop a deep understanding of math, build confidence, and improve academic performance.
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