THE EFFECT OF ROLE PLAYING LEARNING MODEL ON IMPROVING STUDENT CONCEPT UNDERSTANDING ON ENVIRONMENTAL POLLUTION MATERIAL. Al ’Ilmi : Jurnal Pendidikan MIPA, [S. l.], v. 6, n. 1, 2017. Disponível em: https://jurnal.radenfatah.ac.id/index.php/alilmi/article/view/2141.. Acesso em: 19 apr. 2025.