The purpose of the degree project is to find out how the after-school teachers in multicultural suburban areas include all students in the after-school center activities, regardless of their cultural differences and different class backgrounds. More specifically, the purpose is to find out how the leisure time teachers’ work with differentiation.The study is based on two research questions which are, how do the after-school teachers describe the work of differentiation between children in multicultural suburban areas? And what dilemmas and challenges do the after-school teachers describe that they encounter in the work of differentiation between children in multicultural suburban areas? This study is based on a qualitative method where one has chosen to interview trained after-school teachers.The results show that after-school teachers have knowledge and understanding of what the concept of differentiation means and what role it has for the work in their activities. The four after-school center teachers are concerned that differentiation may be misinterpreted depending on the context in question, therefore all teachers believe that differentiation should take place with regard to all students' differences and conditions. The participating after-school teachers are also in agreement that differentiation exists in the school and should only be taken in necessary situations that require adaptation for the learning to develop and help the student achieve the goals of the education.