“Factors That Affect the Grade 12 General Academic Strand Students’ Concentration in Class” (2019) Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research, 1(1). Available at: https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/1243 (Accessed: 7 December 2025).