The purpose of this study was to determine the effectiveness of mobile learning media in computer assembly subjects in vocational high schools. Previously this media had been declared valid by media experts and material experts, which was then used by students. The research method used in this study is quasi-experimental, with time-series research design. Data collection techniques with pretest and posttest. The effectiveness obtained from the results of the post-test seen from classical completeness, all students declared complete and through the gain score in the medium category. Based on the findings of this study it was concluded that the mobile learning media is effective to be used as a learning media and increase the learning outcomes. This research recommends to be tested more broadly and to provide more complete content for the sake of improvement in the development of this mobile learning media.

The purpose of this research is to produce a valid android based mobile learning media that is suitable for learning in Computer and Based Network subjects. This android based mobile learning media is designed to increase student interest in learning, to improve student understanding about learning material and also to improve learning outcomes. This is a Research and Development (R&D) with 4-D model (Define, Design, Develop, Disseminate). In this study is limited to the development stage, is to know the validity of the mobile learning media from material and media experts. Data analysis techniques is descriptive analysis techniques to describe the validity of the android based mobile learning media. Media validity is measured through a validated instruments that has been previously validated. The validity results from this research are android based mobile learning media declared valid in terms of media aspects and material aspects. Based on the results of this validity, it is concluded that the android based mobile learning media was declared valid for use as Computer and Based Network learning media.

Currently, there are still many students who like digital-based learning activities. This study aims to analyze the need for developing Android-based mobile learning media in SMK. The type of research used is survey research and literature study. The methods used in collecting data are observation, interviews, and questionnaires. The instruments used are interview sheets and questionnaires. The data analysis technique used is descriptive statistics. The study results showed that around eighty-two percent of students actively use smartphones outside learning hours. Students who use smartphones in learning are more informal, using them more to find information. On the other hand, only twenty-five students use smartphones to access course materials. Students agree to use their smartphones to study in class because it can increase their interest in learning and their ability to understand the subject matter better. Learning media can be a source of learning for students and help teachers in teaching, and learning activities can be more effective.