Assessment needs to be done to detect children with special needs appropriately. This is important for teachers to provide the right services and learning. This study aims to determine the implementation of assessment in inclusive schools. This research uses quantitative research approach with survey research method. The subject of this research is inclusive school teachers at an inclusive school. The subjects of this study were selected by simple random sampling technique. The instrument used in this study is an interview guideline. Based on the results of the interview, the data were analyzed through statistical analysis techniques. The result of the analysis shows that there is no significant difference in the assessment of inclusion schools in kindergarten, elementary, junior high, and high school.