DEVELOPMENT OF A PROBLEM-BASED LEARNING MODEL FORMULATED BASED ON THE COGNITIVE STRUCTURE OF JUNIOR HIGH SCHOOL STUDENTS. Multidisciplinary, Scientific Work and Management Journal [Internet]. 2026 Feb. 8 [cited 2026 Feb. 9];36(1):1310-9. Available from: https://mswmanagementj.com/index.php/home/article/view/1017