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 [Internet]. 2017 Sep. 29 [cited 2024 Nov. 7];(2):164-70. Available from: https://publications.inschool.id/index.php/icash/article/view/894