PENINGKATAN HASIL BELAJAR MELALUI MODEL PEMBELAJARAN PROBLEM BASED LEARNING MATA PELAJARAN IPAS KELAS IV DI SD N 4 PULOKULON. Sindoro: Cendikia Pendidikan, [S. l.], v. 18, n. 7, 2026. DOI: https://doi.org/10.2238/92e9js36. Disponível em: https://journal.cib.institute/index.php/sindoro/article/view/718. Acesso em: 21 oct. 2026.