There is a statutory requirement on mainstream schools to provide effective learning opportunities for all pupils by setting suitable learning challenges, responding to pupils' diverse learning needs and overcoming potential barriers to learning and assessment. While research has sought to establish the effectiveness of particular pedagogies or the impact of school actions on pupil participation, there has been no prior systematic review that can answer the question of which pedagogical approaches can effectively include children with SEN aged 7-14 in mainstream classrooms. This review focuses specifically on peer group interactions. This systematic review was published by EPPI-Centre in 2004. Systematic reviews aim to find as much as possible of the research relevant to the particular research questions, and use explicit methods to identify what can reliably be said on the basis of these studies.