<![CDATA[Purpose: This study aimed to develop AI-assisted animated video media for teaching cuboid and cube concepts and to evaluate its validity, practicality, and effectiveness in improving elementary students’ conceptual understanding of geometry.Methods: This study employed a Research and Development (R&D) approach using the ADDIE model. The participants consisted of 50 second-grade students from an elementary school in Palembang, divided into an experimental group and a control group through purposive sampling. Data were collected using expert validation sheets, student response questionnaires, classroom observations, and pretest–posttest instruments. Data were analyzed using descriptive statistics, the Shapiro–Wilk test, Levene’s test, and the Mann–Whitney U test.Findings: The developed media achieved a validity score of 92.33% and a practicality score of 89.22%, both categorized as very high. The experimental group outperformed the control group on the posttest, with mean scores of 86.7 and 62.4, respectively. The Mann–Whitney U test revealed a significant difference between groups (p = 0.001) with a large effect size (r = 0.63), indicating that the AI-assisted animated video media effectively improved students’ conceptual understanding of cuboid and cube concepts.Significance: The findings demonstrate that AI-generated animations can provide meaningful visual support for geometry learning by facilitating the understanding of spatial relationships and geometric structures. This study contributes to the development of valid, practical, and effective AI-based learning media and highlights the potential of AI-assisted instructional design in elementary mathematics education.]]>
