SUMMARY
The research aimed to develop Android-based teaching material to improve the understanding of Software Engineering of Informatics Engineering students whose validity and effectiveness are measured. The method used in this paper is Research and Development (R&D) with the Analysis, Design, Development, Implementation, and Evaluation (ADDIE) model which is used to develop An-droid-based teaching material. The validity of teaching material product has con-firmed by media experts and material experts in their fields. The effectiveness of the product was measured through the post-test only control group design with two groups of Informatics Engineering students in Higher Education involving 57 people. Data collection was carried out through questionnaires and tests, with descriptive analysis for the results of the validation of teaching material and pilot tests and t-tests for testing the effectiveness of teaching material. The results showed that Android-based teaching material is easy to use and has video tutorial features and quiz menus that provide direct feedback to users, so teaching materi-al can be applied as a valid and effective learning media in increasing student un-derstanding of Software Engineering material which has never been applied in the research location so far. Based on the results obtained, further research can be carried out on a broader subject and pay attention to other aspects such as increasing motivation and metacognitive students of Informatics Engineering.