International studies have raised concerns about the academic and social implications of inclusive policies on school engagement and successful learning and, in particular, on the ways in which friendships are formed between students with SEN and other students. This article stems from research findings which show that Irish children with special educational needs like school less than their peers without SEN in mainstream settings. Using data from a large scale longitudinal study of 8578 9-year-olds, this paper uses a child centred research approach to investigate why this is the case particularly when they are in receipt of supports. To do this, we focus on processes underlying their dislike of school such as their academic engagement and social/peer relations. We measure academic engagement by looking at their interest in the subjects mathematics and reading and the extent to which they complete their homework. We examine the social/peer relations of students with special educational needs by assessing the extent to which they report liking their teacher. Using the Strengths and Difficulties Questionnaire (SDQ) Scale and the Piers-Harris Self-Concept Scale we also examine the nature of peer relations among children with special educational needs in mainstream settings. Both academic engagement and social engagement play a central role in understanding the broader school engagement of children with special educational needs. By simultaneously examining the role of academic and social relations in shaping the engagement of children with SEN, the analysis provides a unique opportunity to fundamentally assess the barriers to true inclusion for children with special needs. (Contains 2 figures, 2 tables and 4 notes.)