<![CDATA[This study aims to develop a water cycle diorama learning medium and to examine its validity, practicality, and effectiveness in natural science (IPA) instruction for Grade V students at SD Inpres 16, Sorong Regency, during the 2024/2025 academic year. The study employed a Research and Development (R&D) methodology utilizing the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). Data were collected through qualitative approaches, including observation and structured interviews, supplemented by pre-test and post-test instruments comprising 20 multiple-choice items. The study involved 30 Grade V students as a saturated sample. Effectiveness was measured using the N-Gain Score formula, while validity was assessed through expert validation. Results indicate that the diorama medium received a highly valid rating from the media and content expert validator, achieved a mean practicality score of 75 (categorized as practical), and demonstrated an effectiveness level of 80.6%, indicating a high category of mastery. It is therefore concluded that the water cycle diorama medium is valid, practical, and effective as a concrete instructional tool for supporting student learning. comprehension of the water cycle concept in elementary school science.]]>
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