<![CDATA[This study aims to develop a concrete learning media called MagBox (Magnet Learning Box) that is valid, practical, and effective in learning Natural and Social Sciences (IPAS) on the topic of magnetic properties in fourth grade elementary school. The background of this research is based on the low student learning outcomes and the limited use of engaging and interactive concrete media in IPAS learning. This research employed a Research and Development (R&D) method using the ADDIE model, which consists of five stages: Analysis, Design, Development, Implementation, and Evaluation. The research subjects were fourth grade students of SDN 060826 Medan Area in the academic year 2024/2025. Research instruments included expert validation sheets, teacher observations, interviews, and learning achievement tests (pretest and posttest). The validation results by material experts, media experts, and educational practitioners indicated that MagBox is highly feasible with an average percentage above 90%. The practicality of the media was shown by the ease of use for teachers and positive responses from students. The effectiveness of the media was proven by an increase in student learning outcomes, where the average pretest score of 56 improved to 89.4 in the posttest with an N-Gain score of 0.80, which falls into the high category. Therefore, MagBox is declared suitable for use as a learning medium in IPAS, particularly for the topic of magnetic properties. This media not only helps students understand concepts more concretely but also enhances their active participation and learning motivation.]]>
