NINING SARIYYAH; AGUSTINA SURA LANGKAMAU. APPLICATION OF PBL MODEL TO IMPROVE STUDENTS’ LEARNING ACTIVITIES IN SCIENCE SUBJECT CLASS V SDI ENDE 9 . JOURNAL OF HUMANITIES AND SOCIAL STUDIES, [S. l.], v. 2, n. 03, p. 899–905, 2024. Disponível em: https://humasjournal.my.id/index.php/HJ/article/view/354. Acesso em: 4 sep. 2025.