MUBAROK, H. W.; MUSLIM, A. EFFORTS TO IMPROVE LEARNING ACHIEVEMENT AND COLLABORATION USING A PROBLEM BASED LEARNING MODEL ON BUILDING SPACE MATERIAL IN CLASS IV. Proceeding Internasional Conference on Child Education, [S. l.], v. 1, n. 1, p. 30–39, 2023. Disponível em: https://proceeding.unimar.ac.id/index.php/icce/article/view/4. Acesso em: 31 jul. 2025.