<![CDATA[Learning three-dimensional geometry in elementary schools still faces low conceptual understanding due to limited visualization and the dominance of two-dimensional media, which affects students’ learning outcomes. This study aims to analyze and examine the validity and effectiveness of AR-based interactive learning media. The research employed a R&D approach using the ADDIE model. The subjects included 28 fifth-grade students, one teacher, and two media experts and two subject-matter experts. Data were collected through validation questionnaires, teacher and student responses, and pre-test and post-test instruments, and analyzed descriptively and inferentially. The results show that the AR media achieved very high validity (media experts 4.9; material experts 4.8), very good practicality (teacher response 97.71% and student response 94.55%), and effectiveness in improving learning outcomes with p<0.05. In conclusion, AR-based learning media is effective in improving students’ geometry learning outcomes. The implication, AR media has strong potential as an interactive and meaningful mathematics learning.]]>
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