<p class="Abstract">Digital and communication technology has developed in combination with globalization to ensure quick connectivity and distribution of information. In particular, the quality of education is one of the education challenges that have become a target for urgent solutions.  From the various conditions and potentials that exist, efforts that can be made concerning quality improvement in schools are to develop a student-oriented learning system (children center) and facilitate student’s needs for learning needs that are challenging, active, creative, innovative, practical, and fun by developing and apply learning based on Information and Communication Technology. This research was generated using the media development method, which refers to Four-D development, which consists of four stages: Define, Design, Develop, and Disseminate, carried out in high school. Vocational class XI Computer and Network Engineering. In this study, the test subjects were students of class XI Computer and Network Engineering at SMK Negeri 8 Padang. The three validator’s assessment as a whole, the validator test assessment of Android-Based Learning Media is 94.28%. The validity level can be interpreted as being Very Valid to use. Overall, the practicality assessment of Android-Based Learning Media as a learning resource is 88.46%, so that the level of practicality can be interpreted as Very Practical to use. The evaluation of Android-Based Learning Media's effectiveness of 90.86%, so that the level of significance can be interpreted as Very Good for use.<strong></strong></p>

This study aims to develop learning media and produce valid, practical and effective media on the subject of Network Service Technology for class XI Computer and Network Engineering students at SMK Negeri 8 Padang. This study uses an R&D design, with a four-D development model. The four-D development procedure is Define, Design, Development and Disseminate. The data analysis technique used is to describe the validity, practicality and effectiveness of the developed learning media. The results obtained from this development research are learning media based on Android. Based on the results of this research, it can be concluded that the developed media is declared valid on the media aspect of 0.86, the material aspect with a result of 0.95. The media that was developed was practical with the practical value of the teacher's response with results of 97.92% and student responses of 87.70%, and the Android-based learning media that was produced was effectively used with posttest results seen from students' classical completeness of 89% and gain score of 89% 0.44 with medium category. The conclusion is that the developed Android-based learning media can be used and feasible in the learning process to improve student learning outcomes.