The purpose of this study was to investigate the relationship between teachers’ attitudes, perceptions, and knowledge towards integrated STEM. The participants in this study were 185 Indonesian Pre-service and In-service teachers from the eastern, western, and central regions of Indonesia with the difference in ethnicity and culture. The exploration of these three domains was based on the demographic data, teachers’ attributes, and their contribution to the educational system. An adopted and adapted STEM questionnaire was administered online which comprises the likert-scale items that were used as the research tool. The result showed that teachers have a positive correlation between the attitude and knowledge towards integrated STEM, especially for sustainability the quality of education in Indonesia. The implication of this research was about the possibility of elaborating more on the domain of components or sub-components related to current problems faced by teachers towards integrated STEM that exposes teachers’ behavior as the priority for teaching assessment
