“IMPLEMENTATION OF PROBLEM BADES LEARNING (PBL) BASED LESSON STUDY (LS) MODEL TO IMPROVE COGNITIVE LEARNING OUTCOMES VIII STUDENTS OF TONDANGOW CHRISTIAN JUNIOR HIGHT SCHOOL”. Novateur Publications (August 14, 2023): 1–10. Accessed October 14, 2025. https://novateurpublication.org/index.php/np/article/view/173.