<![CDATA[This study aims to develop an interactive pop-up book learning medium, Pop-Up Book Interaktif (PUB BANGRU), for teaching 3D shapes to fourth-grade elementary school students. The study was motivated by students’ low conceptual understanding of 3D shapes and the limited use of interactive learning media. PUB BANGRU integrates three-dimensional visualizations, QR Codes containing audio explanations, and interactive questions to help students understand 3D shape concepts in a concrete, engaging, and meaningful way. This study employed the Research and Development (R&D) method using the ADDIE model, consisting of Analysis, Design, Development, Implementation, and Evaluation. The research was conducted at UPT SD Negeri 56 Gresik with fourth-grade students as the subjects. Data were collected through interviews, media and subject matter expert validation, comprehension test instrument validation at UPT SD Negeri 113 Gresik, teacher and student response questionnaires, and pretest and posttest assessments. The validation results showed that the pretest instrument obtained 95% and the posttest instrument obtained 94%, with an average validity of 94.5%, categorized as highly valid. Media expert validation obtained 92.5%, while subject matter expert validation obtained 81.5%, both categorized as highly valid. Teacher and student responses reached 87% and 96.58%, respectively, categorized as excellent. The effectiveness of the medium was indicated by an N-Gain score of 0.74 with a percentage of 74.72%, categorized as high. Thus, PUB BANGRU is valid, practical, and effective for improving fourth-grade students’ conceptual understanding of 3D shapes.]]>
