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The rapid advancement of technology demands the ability of students to apply knowledge in solving problems that occur in society. This paper proposes the development of student worksheets for Infrared Technology material using the PjBLSTEM learning model. This study aims to determine the feasibility level of the student worksheets and students' responses after using that. This study involved two teachers and 43 students from 2 Vocational High School who were taking Electronic Circuit Application subjects. The level of feasibility was seen from the teacher’s assessment, while the students' responses were seen from the questionnaire. The feasibility assessment instrument and student response questionnaire were prepared based on the Teaching Material Assessment Standards by the National Education Standards Agency (BSNP). This research was conducted using the ADDIE approach. Based on the teacher assessment, the feasibility level of the PjBL-STEM-based worksheets was categorized as very good or very feasible (91%). Meanwhile, from the students' responses, the score was 87.61% in the very good or very satisfied category. The conclusion from this research is that the PjBL-STEM-based student worksheets are very suitable to be used as teaching materials for Infrared Technology material in the subject of Electronic Circuit Application. Keywords—student worksheet, learning model, PjBL, STEM, infrared teknology

Development of Student Worksheet for Infrared Technology Material Using Project Based Learning and Science Technology Engineering Mathematics Learning Model