Hendra Putra, Fakhrur Rizal, Afrizal. THE EFFECT OF A PROBLEM-BASED LEARNING MODEL ON STUDENTS’ CRITICAL THINKING SKILLS IN PHYSICAL FITNESS GYMNASTICS MATERIAL AT SMP NEGERI 1 LAWE SIGALA-GALA. IJSET [Internet]. 2025 Dec. 20 [cited 2026 Apr. 17];5(1):538-42. Available from: http://ijset.org/index.php/ijset/article/view/1385