“THE EFFECT OF PROBLEM-BASED LEARNING WITH EXPERIMENT ON STUDENTS’ RESPONSES AND LEARNING OUTCOME IN THE REFLECTION AND REFRACTION CONCEPT LEARNING”, Proceedings of the ICASH, no. 2, pp. 164–170, Sep. 2017, Accessed: May 25, 2026. [Online]. Available: https://www.inschool.id/publications/index.php/icash/article/view/894