The Effect of Problem-Based Learning Model to Student Learning Outcomes on Colloid TopicSintiya Mahabu, Mardjan Paputungan, Nita Suleman, Opir Rumape, Lukman Abdul Rauf Laliyo and Julhim S. TangioE3S Web Conf., 400 (2023) 04004DOI: https://doi.org/10.1051/e3sconf/202340004004