The generally accepted concept of inclusion is that students with disabilities attend classes with their general education peers with direct support from special educators. This digest, written in Spanish, discusses the rationale for inclusion in middle schools, explores recent research on inclusion, and discusses barriers to implementation. It also notes that the rationale for inclusion has never rested on research findings, but on principle. Proponents insist that the integration of students with disabilities is inherently right, compared often to the same right to racial integration. Both opponents and proponents of inclusion can find scattered research to support their respective views, although current research is inconclusive. Opponents point to research showing negative effects of inclusion, often citing low self-esteem of students with disabilities in the general education setting and poor academic grades. Proponents point to research that shows positive results for both special and general education students, including academic and social benefits. A discussion of the barriers to inclusion, which generally fall into three categories: organizational, attitudinal, and knowledge barriers concludes the document. (LPP)