THE EFFECT OF PROBLEM-BASED LEARNING (PBL) MODEL ON THE PROBLEM-SOLVING SKILLS IN SOCIAL SCIENCE IN ELEMENTARY SCHOOL. Primary: Jurnal Pendidikan Guru Sekolah Dasar, [S. l.], v. 10, n. 1, p. 134–143, 2021. DOI: 10.33578/10.33578/jpfkip.v10i1.8052. Disponível em: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/720. Acesso em: 21 dec. 2025.