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Danjuma, G. S. and Bajon, R.H. EFFECTIVENESS OF CONCEPT MAPPING AND COMPETITIVE INSTRUCTIONAL STRATEGIES ON BASIC EDUCATION STUDENTS’ PERFORMANCE IN THERMAL ENERGY IN TARABA STATE, NIGERIA. bj [Internet]. 2022 Jun. 8 [cited 2025 Oct. 3];1(1):7. Available from: https://www.bwjournal.org/index.php/bsjournal/article/view/630