The study aim was to scope research into student outcomes of co-teaching models to promote inclusive school education for students with disability. A systematized search was conducted of studies addressing models of co-teaching involving two teachers and student outcomes published from January 2008 to June 2019. Each study was appraised for quality. Most of 21 studies that met inclusion criteria were conducted in the United States (n = 17). Fourteen studies followed quantitative approaches, six followed qualitative and one included both. Although the benefits of co-teaching for students were demonstrated, it was difficult to determine comparative effectiveness across models, with only one study providing a systematic comparison. There was some evidence of differential effects across factors such as disability type, grade level, and outcome types, but heterogeneity across study aims, participants characteristics, extent to which co-teaching models were described or implemented, and outcomes targeted precluded meaningful comparisons. Limitations were found in study designs, with appraisal scores ranging from 0.6% to 89%. Hence, the research into student outcomes for various models of co-teaching was found to be limited both in number and quality. Findings point to the need for greater attention to what occurs in classrooms to support positive student outcomes of inclusive education through co-teaching.