The aim of this paper is to explain the importance of tolerance and acceptance of diversity, especially when trying to create a stimulating classroom environment adapted to students with disabilities in primary school. The paper consists of two parts - theoretical and empirical. The theoretical part defines the concept of tolerance, its expression, teaching and encouragement, and the consequences of such action. Furthermore, it is explained who are students with disabilities, what is the didactic-methodological adjustment and what is its significance, a historical overview of the models that preceded the inclusion of children with disabilities in the regular educational system is provided, and the importance of tolerance in the process of creating a stimulating classroom environment is described. Also, an insight was given into the importance of involving the school library in the implementation of tolerance and designing workshops as one of the ways to accept diversity. The empirical part describes the research conducted among teachers through an anonymous questionnaire. The research took place in three primary schools in Croatia, in the Sisak-Moslavina County. There were 59 participants, ie 49 female teachers and 10 male teachers. The aim of the research was to ask primary and secondary school teachers about the importance of tolerance and acceptance of diversity in creating a stimulating classroom environment with the inclusion of students with disabilities in primary school. The results show that teachers pay attention to education for tolerance, but rarely work with parents and with each other when it comes to creating a supportive classroom environment and promoting tolerance.