Quadratic: Journal of Innovation and Technology in Mathematics and Mathematics Education

This study aimed to develop a Realistic Mathematics Education (RME)-based teaching module on polyhedra that is valid, practical, and effective in facilitating students' mathematical communication skills.This research employed a Research and Development (R&D) approach using the ADDIE development model.The participants were Grade VIII-E students of SMP Muhammadiyah 3 Yogyakarta in the 2023/2024 academic year.The research instruments included a teaching module validation sheet, a student response questionnaire, and a post-test.The collected data were analyzed using qualitative and quantitative methods.The results indicated that the RME-Journal homepage: http://ejournal.uin-suka.ac.