Rafyansa Papunas et al. 2023. Problem-Based Learning Model: An Effort To Improve Student Learning Outcomes In Class XI SMA Negeri 2 Tondano. Konstanta : Jurnal Matematika dan Ilmu Pengetahuan Alam. 1, 4 (Oct. 2023), 10–21. DOI:https://doi.org/10.59581/konstanta.v1i4.1387.