“Development And Validation of Instrument of Self-Perceived Proficiency Factors Affecting Students’ Problem-Solving Skills on Gamified Mathematic Instruction”. International Journal of Education in Mathematics, Science and Technology 13, no. 1 (January 27, 2025): 121–149. Accessed July 1, 2025. https://ijemst.com/index.php/ijemst/article/view/748.