ABSTRACT
Severe difficulties in learning about numbers and arithmetic are probably as widespread as disorders of literacy development (dyslexia). The best prevalence estimates for each lie between 3.6% and 6.5% (see Table 26.1). Studies in the U.K. have revealed that poor mathematical skills are more of a handicap in the workplace than poor literacy skills (Bynner & Parsons, 1997). However, there has been much less research on dyscalculia than on dyslexia, and it is a much less widely recognized type of learning disability. In the U.K., its existence was first recognized by the Department of Education in 2001 (DfES, 2001).
