The transition of children from preschool to primary school is considered one of the most critical periods of childhood. For this reason, in recent years, great emphasis has been given on children’s successful entrance in primary education. The purpose of this paper is to record the opinions of Greek teachers on which children are more likely to experience difficulties in their transition to the next educational level. The survey was carried out on a sample of 1,602 teachers from the entire Greek educational territory. The tool that was used was a questionnaire of closed-ended questions. It was also analyzed how their responses varied according to their job position (preschool teachers, primary school teachers and school directors). Teachers believe that the most important factors that are related to the successful transition of children to primary school include the socio-emotional development and the interpersonal relationships of children in preschool, their good relations with teachers, their ability to follow the rules of school, but also parents' trust towards teachers
