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“EFFECTS OF PROBLEM BASED LEARNING APPROACH ON SECONDARY SCHOOL STUDENTS’ MOTIVATION TO LEARN PHYSICS IN ISIOLO COUNTY, KENYA”, IJARR, vol. 8, no. 7, pp. 13–24, Jul. 2023, Accessed: Jun. 25, 2026. [Online]. Available: https://www.ijarr.org/index.php/ijarr/article/view/421