A concise definition of dyscalculia comes from Wikipedia:

Dyscalculia (or math disability) is a involving innate difficulty in learning or comprehending arithmetic. It is akin to dyslexia and includes difficulty in understanding numbers, learning how to manipulate numbers, learning math facts, and a number of other related symptoms (although there is no exact form of the disability). Math disabilities can also occur as the result of some types of brain injury, in which case the proper term is acalculia, to distinguish it from dyscalculia which is of innate, genetic or developmental origin.

Although math learning difficulties occur in children with low IQ dyscalculia occurs in people across the whole IQ range, and sufferers often, but not always, also have difficulties with time, measurement, and spatial reasoning.Estimates of the prevalence of dyscalculia range between 3 and 6% of the population. Dyscalculia does not necessarily imply higher mathematical reasoning difficulties as well as difficulties with arithmetic operations; in fact, evidence exists (especially from brain damaged patients) that arithmetic (e.g. calculation and number fact memory) and mathematical (abstract reasoning with numbers) abilities can be dissociated. That is (some researchers argue), an individual might suffer arithmetic difficulties (or dyscalculia), with no impairment of, or even giftedness in, abstract mathematical reasoning abilities.”

The number of students who struggle with math because of dyscalculia is relatively small. Many more students are simply “math delayed”. They have not been exposed to enough arithmetic to become fluent and as a result they lack the critical foundation skills required for more advanced math. The good news is that both groups of students show strong gains after just 10 – 30 hours of Academy of  MATH® training.

Another significant group of students struggle with math because they struggle with reading. (Please see the Math Difficulties page for more information.) They are either reading delayed or dyslexic. In Canada, according to Dr Julia O’Sullivan and others 40% of students are in this category. Depending on the individual student it may be effective to do Academy of READING®  first, or in some circumstances concurrently with the Academy of MATH® . The Free Assessment would help us make the decision that is best for your child.