The main goals of the research are (1) to determine areas in which students with disabilities need additional support and (2) to analyse differences in the perceived inclusive dimension of the quality of educational processes, from the perspective of teachers as well as from the perspective of students, in five mainstream Croatian primary schools. The research was conducted on a sample of 97 students with disabilities and 97 of their peers without disabilities. Students and their teachers filled in two Questionnaires about students’ behaviours that were developed for the purpose of the Project (the Questionnaire for students and the Questionnaire f. Students with Disabilities and Challenges in Educational Practice 12 suggested that students with disabilities have a need for additional support in the educational process, as well as support in developing appropriate relationships with peers.