Bua, Joel D., and Matronillo Del Mundo Martin. “Handling Multi-Grade Teaching: It’s Educational Implication towards teachers’ Competence”. Management Research Journal 9, no. 2 (May 18, 2020): 1–12. Accessed April 26, 2024. https://ejournal.upsi.edu.my/index.php/MRJ/article/view/3494.