FOSTERING 21 ST CENTURY SKILLS IN PRE-SERVICE TEACHERS THROUGH PROBLEM BASED LEARNING: INTEGRATING REAL- WORLD PROBLEM SOLVING IN TEACHER EDUCATION PROGRAM. IJSSB [Internet]. 2025 Jan. 18 [cited 2026 Aug. 6];3(1):529-38. Available from: https://ijssbulletin.com/index.php/IJSSB/article/view/366