This study aims to produce a valid, practical, and effective Augmented Reality (AR)-based mobile learning media, supported by Assemblr Edu, to accommodate Visual, Auditory, and Kinesthetic (VAK) learning styles for fourth-grade students at SDN 10 Sitiung. The research method used was Research and Development (R&D), with a 4-D development model encompassing the define, design, develop, and disseminate stages. The trial subjects were teachers and fourth-grade students at SDN 10 Sitiung, Dharmasraya Regency. The results showed that the Augmented Reality (AR)-based mobile learning media, supported by Assemblr Edu, achieved validation results from material experts of 86.6%, media experts of 97.5%, language experts of 96.6%, RPM experts of 100%, and question grids of 100%, which fall into the "very valid" category. Therefore, the media is suitable for use in the learning process. The practicality test results obtained a score of 94% by teachers and 82.85% by students, categorized as "very practical." Meanwhile, the effectiveness test results obtained a score of 88.89%, categorized as "very effective." Thus, the Augmented Reality (AR)-based mobile learning media assisted by Assemblr Edu was declared valid, practical, and effective, making it suitable for use as a learning medium to accommodate the VAK learning style in the topic of energy transformations in photosynthesis in grade IV elementary school.
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