This type of research is development. The development model used is the four D which consists of define, design, development, and dissemination. This research was conducted at SMK Tamansiswa Nanggulan Kulon Progo with the research subjects of class XI students of Automotive Engineering. The data collection technique was carried out using a questionnaire. The data analysis technique used is descriptive data analysis technique. This learning media application can be downloaded via Google Playstore with the name Classroom on Android, iPhone, and Windows systems. The results of the feasibility assessment of classroom-based learning media by material experts obtained an eligibility percentage of 77.88% with the category "Eligible". The results of the assessment by media experts obtained an eligibility percentage of 71.73% with the category "Eligible". The results of the assessment by students get an eligibility percentage of 74.00% with the category "Eligible".
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