Implementation of the Problem based Learning Model to Enhance High Order Thinking Skills (HOTS): A Systematic Literature Review . J. Teach. Learn. Elem. Educ. [Internet]. 2024 Feb. 1 [cited 2025 Nov. 7];7(1):110-2. Available from: https://jtlee.ejournal.unri.ac.id/index.php/JTLEE/article/view/78