Alisia, N.; Martuty, A.; Syamsuardi, S.; Bahri, A.; Intisari, I.; Amri, N. A.; Hasbur, H. S. The Effect of the Application of the Problem Based Learning (PBL) Learning Model on Early Childhood High Order Thinking Skill (HOTS): A Quasi-Experimental Study. jpud 2025, 19, 295-306.