View all blogs

Dyslexia, Dysgraphia, Dyscalculia (oh my)—a la The Wizard of Oz

by

Educators sometimes feel like Dorothy in The Wizard of Oz, encountering a trio of formidable challenges along the Yellow Brick Road: reading difficulties (dyslexia), writing difficulties (dysgraphia), and math difficulties (dyscalculia). These three learning disabilities are distinct in their core features – dyslexia affects reading and spelling, dysgraphia impacts writing (especially handwriting and spelling), and dyscalculia involves persistent trouble with number sense and math – yet they often travel together in the same student. In other words, it’s not unusual for a child to experience a mix of reading, writing, and math needs all at once.

Untangling the Twister: Differential Diagnosis

When multiple learning issues co-occur, one big challenge is figuring out which difficulty is coming from which source – what professionals call differential diagnosis. For example, a student with dyslexia might also appear to struggle in math class, but the root cause could be reading-based (difficulty decoding word problems) rather than a true math disability. Similarly, both dyslexia and dysgraphia can lead to poor spelling and written expression issues; an evaluator must discern whether the primary cause is a reading deficit or a handwriting/writing impairment. This matters, because effective support hinges on knowing the difference. Is the child struggling to read instructions (pointing to dyslexia)? Or is the handwriting slow and labored (pointing to dysgraphia)? Perhaps the student understands math concepts but can’t memorize basic facts, hinting at dyscalculia – or, conversely, math errors stem from an attention or language issue rather than a true number-sense problem. Differential diagnosis requires looking at the whole picture of the child’s performance. As Pearson’s dyslexia, dysgraphia, and dyscalculia white papers all note, these learning disabilities often overlap and can mask or mimic one another, so evaluators should assess across domains and consider multiple possibilities. The goal is to ensure each student gets the right kind of help rather than a one-size-fits-all label. 

“We’re Not in Kansas Anymore:” A Team of Brains, Hearts, and Courage

Just as Dorothy didn’t navigate Oz alone, an educator shouldn’t tackle a complex learning profile solo. Interprofessional collaboration is key. A multidisciplinary team – classroom teachers, special educators, reading specialists, school psychologists, speech-language pathologists, OTs, parents, and even the student – all bring unique expertise (brains), compassion (heart), and determination (courage) to the table. According to Pearson’s dyslexia toolkit white paper, many professionals and family members may be involved in supporting a child with dyslexia, dysgraphia, or dyscalculia, and collaboration among these groups is crucial for a “robust, evidence-based assessment and intervention plan.” In practice, this might mean a teacher shares observations from class; a specialist conducts targeted testing, and together they compare notes. An evaluator might do academic testing, while an occupational therapist looks at handwriting samples, and a psychologist evaluates cognitive processing; then the team convenes to synthesize the findings. Clear data (assessments, work samples, observations), a solid knowledge base, and team-based decision-making guide the best path forward. This collaborative, comprehensive approach ensures that interventions address all facets of a student’s needs.  

No Single Wizard: Professional Judgment

Even with great assessment tools, identifying learning disabilities isn’t as simple as a wizard behind a curtain. Professional judgment and expertise play a critical role. We should not make a dyslexia, dysgraphia, or dyscalculia diagnosis based on any one test score or rigid cutoff. These diagnoses rest on a convergence of evidence – patterns of difficulty that persist over time and across contexts. For instance, a student might perform poorly on one writing test due to fatigue or anxiety; that single data point alone doesn’t prove dysgraphia. Likewise, scoring below a certain percentile in math isn’t automatic proof of dyscalculia unless we see consistent, significant struggles with number-related tasks and rule out other factors. Good evaluators consider classroom observations, developmental history, and the student’s response to interventions in addition to test results. They also take care to rule out other causes (e.g. hearing/vision issues, lack of instruction, emotional factors) as part of a thorough differential diagnosis. In short, professional judgment is the compass that interprets the data – much like the Wizard of Oz ultimately reminded the characters that the qualities they sought were already within them. And importantly, practitioners recognize that formal labels (like “SLD in reading” or “SLD in math”) are starting points, but not the whole story – two students with the same label may have very different profiles. Professional insight ensures instruction and accommodations truly fit the student.  

Finding the Emerald City: Practical Implications for Educators

What does all this mean day-to-day in the classroom? A few guideposts on your journey:

  1. Be alert that learning challenges might be layered. If a child has a reading disability, keep an eye out for handwriting or math red flags (and vice versa). Early screening in multiple areas can catch co-occurring issues. 
  2. Consult with colleagues in other disciplines; for example, if you suspect dysgraphia in a student who’s already identified with dyslexia, loop in an occupational therapist or special educator for further insight. 
  3. Use a holistic approach when supporting the student. An intervention plan should be informed by all the data gathered: formal test results and informal evidence. Maybe phonics instruction is needed for dyslexia, plus extra handwriting practice or assistive technology for dysgraphia – and perhaps strategies for math anxiety if numbers are intimidating. By addressing each area of need, we help the student make more balanced progress. 
  4. Remember the importance of your own professional observations. As an educator, you see the student in natural learning situations; your input (how the student approaches tasks, where they get frustrated or shine) is invaluable in shaping their support plan. 
  5. Emphasize student-centered planning. In the Land of Oz, each traveler had a unique wish (brain, heart, courage, home); likewise, each learner’s profile is unique. Use your team’s collective “brain” (expertise), “heart” (empathy), and “courage” (willingness to try tailored interventions) to give that student the confidence and skills they need. 

With collaborative effort and informed judgment, we can guide students with dyslexia, dysgraphia, dyscalculia – or any combination thereof – to find their own path to success. There really is “no place like home,” and in this case, home is a school environment where all their learning needs are understood and met in harmony. 

References: The insights above are drawn from Pearson’s Dyslexia Toolkit white papers on dyslexia, dysgraphia, and dyscalculia (Breaux & Eichstadt, 2025) – a series of technical papers that compile research and best practices, along with a toolkit of assessment and intervention resources used to support professionals. These documents underscore the distinct yet interrelated nature of reading, writing, and math disabilities, and they advocate for comprehensive assessment and team-based problem-solving.  

Breaux, K., & Eichstadt, T. (2025). Pearson Clinical Assessment solutions: A dyslexia toolkit 

[Technical Report]. NCS Pearson. 

Breaux, K., & Eichstadt, T. (2025). Dysgraphia... and how it relates to dyslexia [Technical Report]. 

NCS Pearson. 

Breaux, K., & Eichstadt, T. (2025). Dyscalculia... and how it relates to dyslexia [Technical Report]. 

NCS Pearson.