<![CDATA[This study aims to develop a mobile learning medium based on Augmented Reality that is feasible and effective for improving students’ learning outcomes in Vocational High Schools. The research method used is Research & Development, employing the ADDIE development model (Analysis, Design, Development, Implementation, Evaluation). The study used questionnaire instruments for validation by subject matter experts, media experts, design experts, as well as media trial results. The quantitative data analysis techniques used in this research include data from the feasibility and effectiveness questionnaires, along with qualitative data in the form of observations and documentation. The feasibility validation assessment was carried out in five stages: validation by subject matter experts obtained an average score of 95.1%, validation by instructional media experts obtained an average score of 88.7%, validation by instructional design experts obtained a score of 97.6%, small group trials obtained a score of 86.2%, medium group trials obtained a score of 92.5%, and field trials obtained a score of 98.6%. The average score from the expert validations and trials was 93.1%, indicating that the mobile learning medium based on Augmented Reality is feasible for use. The results of normality and homogeneity tests showed that the research data were normal and homogeneous. The effectiveness test using a one-tailed T-test yielded a score of 0.000 and, based on the predetermined criteria (if Sig. ≤ 0.05, then Ho is rejected), there was a significant difference between the post-test results of the control class and the post-test results of the experimental class. Therefore, it can be concluded that the mobile learning medium based on Augmented Reality is effective for use]]>
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