This book examines the relationship between self-concept and mathematics achievement among Upper Primary Visually Impaired Pupils in Nyanza Province, Kenya. The book also describes the differences in self-concept between low vision and totally blind pupils. In analysis, the interaction effects of sex and visual impairment relationship was of interest. An expostfacto research design was used since the independent variables had occurred already. Independent variables were self-concept in mathematics, sex and visual impairment. The dependent variable was mathematics academic achievement. Using different categories of visual impairment that is low vision and totally blind, the design enabled an investigation of the interaction effect of sex, Maths self-concept and achievement among Upper Primary visually impaired pupils in Nyanza Province, Kenya.