THE EFFECTIVENESS OF THE APPLICATION OF PROBLEM-BASED LEARNING WITH A SCIENTIFIC APPROACH TO PROBLEM-SOLVING SKILLS IN SOCIAL STUDIES LESSONS IN ELEMENTARY SCHOOLS. JME [Internet]. 2026 Apr. 29 [cited 2026 Jun. 23];2(1):112-24. Available from: https://jme.cerdasnusantara.org/jme/article/view/58