.png)
Why Do Kids Struggle With Math?
The Science Behind Dyscalculia, Working Memory, and Math Anxiety
Why Do Kids Struggle With Math? The Science Behind Dyscalculia, Working Memory, and Math Anxiety
Quick answer: Kids struggle with math for three main reasons, and each one starts in a different part of the brain. Some kids have a specific difficulty understanding numbers themselves (called developmental dyscalculia). Others have trouble holding multiple steps in their head at once, which is common in kids with ADHD. And some kids understand math just fine, but anxiety gets in the way and makes their minds go blank when it's time to perform. Autistic children can face extra challenges, especially when math moves from simple calculations to word problems. A thorough evaluation, using tests like the WISC-V/WAIS-IV, WIAT-4, KeyMath 3, CAS2, and Conners Behavior Rating Scale, can help pinpoint exactly which one is affecting your child.
Parents and teachers often assume a child who struggles with math just "isn't a numbers person" or needs to try harder. But research tells a more complicated story. Math difficulty isn't one single problem — it's a symptom that can come from at least three different sources in the brain, and each one calls for a different kind of help.
Knowing which one is at play makes a huge difference. A child with dyscalculia needs a completely different approach than a child who gets overwhelmed trying to juggle multiple steps in a problem. And both of those kids need something different from a child whose math skills are actually fine, but whose nerves take over during a test. This article breaks down the three main reasons kids struggle with math, explains how autism factors in, and walks through the kinds of testing that can help tell these issues apart.
Let’s find out what will help
If math has become a source of frustration for your child, a free phone consultation is a place to describe what you are seeing and discuss whether an assessment is the right next step.
What are the three reasons kids struggle with math?
Research shows that most math struggles in children come down to three different (and sometimes overlapping) root causes: a specific difficulty with numbers, an overloaded working memory, or anxiety that gets in the way.
Trouble understanding numbers (developmental dyscalculia)
Developmental dyscalculia comes from differences in a part of the brain called the intraparietal sulcus, along with weaker connections in the surrounding brain network. Kids with this difficulty struggle with their basic "number sense" — their built-in ability to understand quantities.
In everyday life, this might look like a child struggling to quickly tell whether 7 is bigger than 4, having trouble instantly recognizing small groups of objects without counting them one by one, or finding it hard to connect a quantity (like a pile of blocks) to the number that represents it. Dyscalculia only affects number skills — a child's reasoning, reading, and language abilities can be completely normal. The struggle is isolated to numbers themselves.
An overloaded working memory (executive function struggles)
The second cause has nothing to do with number sense. Instead, it involves the parts of the brain responsible for holding and juggling information — mainly the prefrontal cortex. Kids with this profile understand numbers just fine, but they struggle to hold several pieces of information in their head at once and use them in the right order. This is especially common in kids with ADHD.
Multi-step problems, like regrouping, long division, or algebra, can overwhelm a child's working memory. When that happens, math facts don't get a chance to "stick" in long-term memory. These kids often genuinely understand the math concept, but they lose their place partway through solving the problem.
Anxiety getting in the way (math anxiety)
The third cause isn't about brain structure at all — it's about emotion. Math anxiety involves the amygdala (the brain's alarm system) going into overdrive, while the working memory network quiets down (Young et al., 2012).
In practice, anxiety works like a second task running in the background. Your child's brain has to split its attention between actually solving the problem and managing anxious thoughts. This often causes kids to "freeze" or perform worse, especially on timed tests, even when they fully understand the material (Ramirez, Gunderson, Levine, & Beilock, 2013).
How does autism affect math skills, and when does it show up?
Autism doesn't create math struggles in the same way for every child. Research shows it really depends on the child's age and the type of math task involved.
Early childhood: language comes first
Differences in math skills can show up even before kids start school. Schopman and Van Luit (2020) found that early math skills, like counting, sorting, and matching one object to one number, already look different in autistic children between ages 4 and 7. Language delays play a big role in how well young kids pick up number concepts.
Auriemma and Grapin (2021) followed children from kindergarten through second grade and found that early number recognition is often just fine. But by second grade, the gap between autistic children and their peers tends to widen, right around the time lessons shift toward multi-step addition, subtraction, and word problems.
Older kids and teens: word problems get harder
The biggest struggles tend to show up once math moves from simple calculations to word problems. Oswald et al. (2016) found that math skills in autistic teens drop most noticeably on word problems, and that this drop is closely tied to attention, working memory, and reading comprehension — not to basic calculation skills.
Wei et al. (2015) tracked math achievement over six years and found that autistic children often start off with average calculation skills. But their progress in math reasoning slows down significantly as lessons become more abstract.
When does the workload become too much?
Titeca, Roeyers, Loeys, and Desoete (2014) looked closely at exactly when math performance drops for autistic children. They found autistic kids performed similarly to their peers on simple, visual math tasks. But performance dropped noticeably when a task demanded a lot of verbal working memory, like solving math in their head or listening to a problem read aloud.
Mayes and Calhoun (2008) found a similar pattern: math struggles were most obvious when there was a big gap between a child's reasoning ability and their processing speed or working memory. These struggles showed up most during timed tests or tasks requiring fast handwriting.
What tests help tell these causes apart?
Because these three causes can look so similar on the surface, a full evaluation is often needed to tell them apart. Together, the following tests look at math skills specifically, general thinking skills, and emotional or behavioral patterns.
WISC-V (for children) or WAIS-IV (for adults)
This test builds a picture of your child's overall thinking skills. The Working Memory Index, measured through tasks like remembering strings of numbers, isolates how much information your child can hold and use at once. If this score is much lower than their verbal reasoning score, it points to a working memory issue rather than a core problem with math itself. The Processing Speed score also helps rule out slow processing speed, which can look like a math disability on timed tests but isn't.
WIAT-4 (Wechsler Individual Achievement Test, Fourth Edition)
The WIAT-4 measures academic skills directly and can be compared to the WISC-V/WAIS-IV results. If your child scores well on Math Problem Solving but poorly on Numerical Operations and Math Fluency, that pattern points to a working memory issue. If scores are low across the board on all math sections, but reading and language scores are normal, that points to dyscalculia.
KeyMath 3 Diagnostic Assessment
This test pinpoints exactly where a child's math struggles begin, breaking things down into Basic Concepts, Operations, and Applications. It shows whether a child struggles with foundational number sense (pointing to dyscalculia) or only once multi-step calculations are introduced (pointing to a working memory issue).
CAS2 (Cognitive Assessment System, Second Edition)
This test looks at how a child plans, pays attention, and processes information, without relying heavily on verbal skills. It helps show whether a child struggles more with the mental "juggling" needed for multi-step problems or with organizing spatial and logical information.
Conners Behavior Rating Scale (CBRS)
This is a questionnaire filled out by parents, teachers, and sometimes the child. High scores for inattention or hyperactivity can help explain working memory breakdowns during math. High scores for anxiety and academic stress, alongside otherwise normal test scores, point to math anxiety as the main issue rather than a deeper learning difficulty.
A quick summary of common profiles
Profile | Achievement & Thinking Test Results | KeyMath 3 Results | CAS2 & CBRS Results | Likely Cause |
A | Low overall math score; normal thinking skills; normal reading/writing | Low Basic Concepts & Operations | Normal processing profile; normal behavior/emotional scores | Developmental Dyscalculia |
B | Low Working Memory score; low multi-step math, but okay on Problem Solving | Low multi-step Operations; okay Basic Concepts | Weaker Planning/Attention; high inattention/hyperactivity | Working Memory / ADHD-Related Struggles |
C | Normal thinking skills; poor timed math, but okay untimed | Normal untimed performance; more errors under time pressure | Normal processing profile; high anxiety and stress scores | Math Anxiety |
What should parents and educators do with this?
A child's struggle with math is rarely about effort or ability alone. It's usually a sign pointing to one of a few different underlying causes, and each one calls for a different kind of support. A child with suspected dyscalculia benefits from clear, hands-on instruction that builds number sense step by step. A child with a working memory bottleneck often improves when the workload is broken into smaller pieces, or when they're given scratch paper to track their steps. A child whose math anxiety is the real issue needs help managing stress first — drilling accuracy alone won't fix the problem.
If your child's math struggles don't improve with typical classroom support, it may be worth asking for a full evaluation using tools like the WISC-V, WIAT-4, KeyMath 3, CAS2, and CBRS. This kind of testing can pinpoint exactly what's going on and point you toward the support most likely to help.
Frequently Asked Questions
What's the difference between dyscalculia and math anxiety?Dyscalculia is a difference in how the brain processes numbers themselves — it affects a child's basic sense of quantity. Math anxiety is different: the number sense is intact, but fear and stress get in the way, especially under time pressure. A child with dyscalculia will struggle even with relaxed, untimed tasks. A child with math anxiety often does just fine once the pressure is removed.
Can ADHD cause math struggles even if my child understands the concepts?Yes. ADHD is closely linked to working memory and organizational challenges. A child with ADHD might fully understand a math concept but still lose track partway through a multi-step problem, like regrouping or long division, simply because there's too much to hold in mind at once.
At what age do math struggles in autistic children usually become noticeable?There are typically two key points. Differences in early number skills can appear as early as ages 4 to 7, often tied to language delays (Schopman & Van Luit, 2020). A bigger gap tends to open up around second grade and grow through the teen years, as lessons shift from basic calculation toward word problems and abstract thinking (Auriemma & Grapin, 2021; Wei et al., 2015).
What tests help figure out the cause of my child's math struggles?A thorough evaluation usually includes the WISC-V or WAIS-IV (thinking skills), the WIAT-4 (academic achievement), the KeyMath 3 (specific math skills), the CAS2 (processing style), and the Conners Behavior Rating Scale (behavior and emotions). Together, these tools can help tell dyscalculia, working memory struggles, and math anxiety apart.
Can a child outgrow math difficulty without extra help?It depends on the cause. Math anxiety and mild working memory struggles can improve with classroom support and stress-reduction strategies. Developmental dyscalculia, though, is a lasting condition that typically needs structured, hands-on teaching rather than time alone to improve.
References
Auriemma, D. L., & Grapin, S. L. (2021). Early math development in children on the autism spectrum: A longitudinal analysis. School Psychology Review, 50(2), 234–245.
Mayes, S. D., & Calhoun, S. L. (2008). WISC-IV and WIAT-II profiles in children with high-functioning autism. Journal of Autism and Developmental Disorders, 38(3), 428–439.
Oswald, T. M., Beck, J. S., Iosif, A. M., McCauley, J. B., Gilotty, L. J., Halfond, R., ... & Solomon, M. (2016). Clinical and cognitive characteristics associated with mathematics problem-solving ability in adolescents with autism spectrum disorder. Autism Research, 9(4), 480–490.
Ramirez, G., Gunderson, E. A., Levine, S. C., & Beilock, S. L. (2013). Math anxiety, working memory, and math achievement in early elementary school. Journal of Cognition and Development, 14(2), 187–202.
Schopman, E. N., & Van Luit, J. E. (2020). Early numeracy skills in young children with autism spectrum disorder. Research in Autism Spectrum Disorders, 75, 101574.
Titeca, D., Roeyers, H., Loeys, T., & Desoete, A. (2014). Mathematical abilities in children with autism spectrum disorder: The role of working memory and visual-spatial processing. Research in Autism Spectrum Disorders, 8(11), 1567–1577.
Wei, X., Christiano, E. R., Yu, J. W., Blackorby, J., Shattuck, P., & Newman, L. (2015). Reading and math achievement profiles and longitudinal growth trajectories of children with an autism spectrum disorder. Autism, 19(2), 200–210.
Young, C. B., Wu, S. S., & Menon, V. (2012). The neurodevelopmental basis of math anxiety. Psychological Science, 23(5), 492–501.
Comments