Over the last 20 years, there is no topic that causes more controversy in special education among teachers, administrators, and parents than inclusion. Inclusion represents the belief or philosophy that students with disabilities should be integrated into the regular education classrooms whether or not they can meet traditional curricular standards. The purpose of this study was to examine the potential advantages and disadvantages of the inclusion of students with disabilities into regular education classrooms. This study included a comprehensive review and critical analysis of research and literature concerning the issue of inclusion, the factors that contributed to the movement to educate students in inclusive classrooms, inclusion versus mainstreaming.