The objectives of this research are (1) to produce learning media for Android-based AC systems at SMK Insan Cendekia Yogyakarta (2) to test the feasibility of the media assessed by material and media experts using a questionnaire. The subjects in this research were material experts for lecturers and teachers, media experts and students of class XI TKR SMK Insan Cendekia Yogyakarta users of the learning media of the Android-based AC system that was developed. This research is included in the research and development (Research and Development) that uses the 4D model. This research model is carried out in the define, design, development and dessemination stages. The results of the research show that (1) the development of learning media for an Android-based AC system can be done using the development of a four-D model consisting of the define, design, develop, disseminate, and (2) the development of learning media for an Android-based AC system is feasible to use as material. teaching, this is evidenced by the results of the percentage validation of Lecturer and Teacher material experts, which is 82.275% and 89.575% is in the "very feasible"category. Meanwhile, media experts get a score of 88.75% in the "very decent"category. The last stage is product testing. The product trial was carried out in two stages, namely a trial with a small group with a number of respondents 14 students obtained a percentage of 76.186% in the "very feasible"category, and a large group trial with 21 respondents getting a score of 82.68% with a category "very feasible"the conclusion of this research is in the category of representation above 75% where in that category the trial on this media is very feasible to use, and suggestions for further developers to be able to develop better about this application. © 2024 Author(s).
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