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The Wiley handbook of diversity in special education
According to the Organization for Economic Cooperation and Development (OECD), the literacy and numeracy skills that are distributed across a population will have significant impact on economic and social outcomes. In particular, the “higher the levels of inequality in literacy and numeracy skills … the greater the inequality of distribution of income” (OECD, 2013, p. 26). However, although literacy skills are important, it has been suggested that poor mathematical skills may be more of a handicap than poor literacy skills, especially in the workplace (Butterworth, 2005; McCloskey, 2007). As McCloskey (2007) notes, “… quantitative concepts and information are involved in many facets of home, work and community life …” (p. 421). Poor quantitative skills are likely to pose significant problems in everyday life, even into adulthood (Dougherty, 2003; McCloskey, 2007).
Van Garderen, Delinda; Poch, Apryl L.; Jackson, Christa; and Roberts, Sarah A., "Chapter 11: Teaching mathematics to students with disabilities from diverse backgrounds" (2017). Special Education and Communication Disorders Faculty Publications. 54.