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2. https://www.kumon.com/resources/how-to-make-math-more-engaging/
3. Abe, T. O., & Gbenro, O. S. (2014). A Comparison of Students’ Attitudinal Variables towards Mathematics between Private and Public Senior Secondary Schools. J. of Educational Policy and Entrepreneurial Research, 1(1), 32-39.
4. http://jeper.org/index.php/JEPER/article/viewFile/4/4
5. Andaya, O. J. F. (2014). Factors that affect mathematics achievements of students of Philippine Normal University-Isabela Campus. Researchers World, 5(4), 83.