<![CDATA[Students often struggle to understand scientific concepts due to their abstract nature and the limited use of interactive learning media. This study aims to develop 3D mock-up media for learning about the respiratory system in elementary schools. The research adopts an R&D approach using the ADDIE development model. The study participants included one teacher and 25 fifth-grade students from SDN 3 Ngeling. Data collection methods encompassed observation, interviews, questionnaires, as well as pre-test and post-test. Data were analyzed qualitatively and quantitatively to assess the feasibility of the product. The results of the validity test from the media validator obtained a score of 98.6% and 97.3% with a very valid category. In comparison, the material's validity test achieved a 97.75% result, placing it in a very valid category. This shows that this media is valid for use in research. In addition, the results of the student and teacher questionnaires also showed positive results, respectively 95% and 96% with a very good category, thus indicating that this media is feasible and effective for use in learning the respiratory system. The results of the paired sample T-test, with N-Gain values of 0.000 and 0.662, indicate differences and improvements in student learning outcomes. As a follow-up, it is expected that 3D mock-up media can be combined with digital technology to improve students' learning experiences.]]>
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