Development of STEM-Based Basic Geometry Learning Worksheets to Improve Students' Geometric Skills

Abstract: This study aims to develop STEM-based Basic Geometry learning worksheets (LKM) to enhance students’ geometric skills.The developed instructional materials include an electronic moduleand practicum guidesfor the BasicGeometry course. To supporttheir implementation, studentworksheets and geometric skill assessment instruments were also designed. The research employed a Research and Development (R&D) approach referring to the 4-D development model, consisting of: (1) Define, (2) Design, (3) Develop, and (4) Disseminate. The quality of thedeveloped materials and instruments was assessed basedon (1) their alignment with the course objectives and curriculum, (2) expert validation consistency, and (3) improvement in students’ geometric skills. The study is aligned with the 2021–2025 Research MasterPlan (Renstra) of Universitas PGRI Pontianak, underthe priority fieldof Innovative Education and Learning in Science, Technology, Social Sciences, and Humanities. The expected outcome of this study is an electronic STEM- based module that effectively enhances students’ geometric abilities.