Eight children between 7 and 11 years of age were interviewed about their understanding of their own diagnoses. The diagnoses in question were attention deficit hyperactivity disorder, autism and nonverbal learning disorder. They were from different special schools that are segregated from state schools. In addition to the interviews, a role play setting with dolls representing a school teacher, parents, peers, a school psychologist and a doctor was used as a basis for speaking about the children's understanding of the special school in relation to their diagnoses. The study revealed that the children use a simplified medical model for understanding their diagnoses and behaviour. Furthermore, they partly perceive the special school as a medical institution, as well as an educational institution. Finally, the study showed that the children consider themselves different from normal children and incapable of participating in shared learning communities such as state schools. This is of particular interest in relation to these children's future transition from special schools to public learning institutions, especially with regard to their inclusion in the latter.