Subiyantoro, Singgih, Erika Laras Astutiningtyas, Krisdianto Hadiprasetyo, Isna Farahsanti, and Andhika Ayu Wulandari. “Teacher and Student Perceptions of Problem-Based Learning: A Comparative Analysis Across Educational Levels”. International Journal of Educational and Life Sciences 3, no. 2 (March 22, 2025): 1899–1908. Accessed October 7, 2026. https://journal.multitechpublisher.com/index.php/ijels/article/view/3443.