The final paper analyzed the inclusion of children with developmental disabilities within the framework of differentiated teaching. Differentiated teaching is a form of teaching that can be useful in working with students with developmental disabilities. It is a form of teaching in which students work independently to a certain degree. The goal of this form of teaching is to respond to the different educational needs of students, including students with developmental disabilities, by using different strategies that change teaching methods and the curriculum itself. In this paper empirical research was carried out, the aim of which was to examine the perception of teachers (class, subject and class and subject teaching) and professional associates (educational rehabilitator, pedagogue, psychologist, speech therapist and social pedagogue) in regular primary schools of the Republic of Croatia about the inclusion of students with disabilities in development within the framework of differentiated teaching. A total of 148 respondents participated in the research, filling out a survey questionnaire created specifically for the purposes of the research online. The results of the conducted research showed that teachers and professional assistants in Croatian primary schools generally have a positive view of the inclusion of students with developmental disabilities within the framework of differentiated teaching.