IBRAHIM, Mokhzani; JAMALUDIN, Khairul Azhar. The roles of teacher and students via blended problem-based learning: Improving students’ mastery of three representation levels of chemistry. EDUCATUM Journal of Science, Mathematics and Technology, [S. l.], v. 6, n. 2, p. 9–21, 2019. DOI: 10.37134/ejsmt.vol6.2.2.2019. Disponível em: https://ejournal.upsi.edu.my/index.php/EJSMT/article/view/2745. Acesso em: 14 may. 2025.