This research aims to develop Assemblr Edu learning media with the RADEC learning model for implementing the Pancasila Student Profile Strengthening Project (P5) in Elementary Schools. This research used the R&D (Research and Development) method with the 4D model. The research subjects consisted of material validators, media validators and 58 students. The data collection instrument used in this research was a questionnaire which was then analyzed descriptively qualitative and quantitative. The results of this study indicated that Assemblr Edu learning media based on the results of material validation obtained 97% with a very feasible category, and the results of media validation obtained 92% with a very feasible category. Educators could apply the results of the Assemblr Edu learning media development in implementing P5 with the RADEC learning model in elementary schools. This research makes a significant contribution to the education field, especially in utilizing Assemblr Edu technology and the RADEC learning model in elementary schools. In practice, it can enrich the literature on technology-based learning and educational innovation to improve the quality of high-quality learning.