What is Dyscalculia?

A formal definition published by the American Psychiatric Association (2013) defines dyscalculia:

Developmental Dyscalculia (DD) is a specific learning disorder that is characterized by impairments in learning basic arithmetic facts, processing numerical magnitude and performing accurate and fluent calculations. These difficulties must be quantifiably below what is expected for an individual’s chronological age, and must not be caused by poor educational or daily activities or by intellectual impairments.

According to Dyslexic Advantage, 3-10% of school-aged children are identified as having dyscalculia. What is dyscalculia? Dyscalculia is usually defined as a difficulty with calculations or arithmetic skills that is not explained by low intelligence or inadequate schooling (Eide, 2019).


Some challenges of children with dyscalculia can include:

      • a poor sense of number quantity
      • slower speed recalling numbers
      • difficulty memorizing facts
      • difficulty with sequencing and the memorization of procedure
What is Dyscalculia? | FAQs| The Written Word Center for Dyslexia and Learning

Websites on Dyscalculia


  • MathsExplained,  this is the website of Steve Chinn. It has a collection of online video tutorials.


  • DyscalculiaServices, this is the website of Dr. Annika Schreuder, who is an expert in the U.S. She provides math resources and dyscalculia services.


  • MathematicalBrain,  this is the website of Brian Butterworth, who is an expert in the U.K.


  • Dyscaluclia.org, this is the website of Renee Newman, a special education teacher.


  • AboutDyscalculia, this website is written by a dyscalculia researcher Dr. Anna Wilson.


  • Multisensory Math, this approach has been expanded and enhanced by Marilyn Zecher, M.A., CALT over the last twenty years.

Additional Websites and Resources


  • BuildmathMinds, this is the website of Christina Tondevold. She has created resources to help students with dyslexia






  • Math Learning Center – A pdf titled Using the Rekenrek as a Visual Model for Strategic Reasoning in Mathematics