In 2018, the general education Curriculum was promulgated and is currently being implemented at all educational levels. This brings about numerous benefits via integrating the STEM education model into learning subjects and topics, contributing to the development of students’ character and competence. The article evaluates the effectiveness of teachers’ applying STEM education in teaching and the conditions for implementing STEM education in high schools using a questionnaire combined with in-depth interviews. The research results indicate that students actively engage in lessons and achieve the learning objectives, as well as improve critical skills. Furthermore, many objective factors must be considered when using methods, tools, and learning materials suitable for different student groups. The survey results provide a practical basis to help educational institutions enhance STEM teaching in terms of content, methods, forms, and teaching conditions.