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Mohammad Nafis Abdul Rouf, Timing Merawati, Abdul Azis Masyhuri, Nurul Hidayati. THE EFFECTIVENESS OF USING PROBLEM BASED LEARNING MODEL TO IMPROVE STUDENTS PROBLEM SOLVING ABILITY AND LEARNING MOTIVATION. Int. J. Geogr. Soc. Multicult. Educ. [Internet]. 2025 Jun. 1 [cited 2025 Jun. 30];3(1):1-10. Available from: https://journal.unesa.ac.id/index.php/ijgsme/article/view/35400