Nurcahyati, S.A., Haji, S. dan Agustinsa, R. 2024. Developing student worksheets based on project-based learning to improve understanding of mathematical concepts for students at grade VIII of state junior high school 6 Seluma. Math Didactic: Jurnal Pendidikan Matematika. 10, 1 (Mei 2024), 126-141. DOI:https://doi.org/10.33654/math.v10i1.2350.