Her research lies at the intersection of math education and special education and is concerned with understanding the nature of mathematical learning disabilities. Dr. Lewis’s work centers on an understanding of disability in terms of cognitive difference rather than deficit. This theoretical orientation – informed by a Vygotskian perspective of disability and Disability Studies – involves identifying differences in student’s understanding as they occur in authentic learning environments, evaluating the accessibility of instruction, and considering ways in which students may compensate. Dr. Lewis holds a Ph.D. in Mathematics Education from the University of California, Berkeley and completed post-doctoral work at Johns Hopkins and University of Minnesota.