PENGARUH MODEL PROBLEM BASED LEARNING (PBL) BERBASIS CHILDREN LEARNING IN SCIENCE (CLIS) TERHADAP MOTIVASI BELAJAR PESERTA DIDIK. Karst: Jurnal Pendidikan Fisika dan Terapannya, [S. l.], v. 4, n. 2, p. 50–61, 2021. DOI: 10.46918/karst.v4i2.1127. Disponível em: https://ejournals.umma.ac.id/index.php/karts/article/view/1127. Acesso em: 14 aug. 2025.