PARILLA, Luzviminda A. Effectiveness Of “Matatag Na Filipino” On Grade 9 Filipino Proficiency: A Matched-Pair Quasi-Experimental Study. Journal of Elementary and Secondary School , [S. l.], v. 4, n. 1, p. 36–51, 2026. DOI: 10.31098/jess.v4i1.3820. Disponível em: https://journals.researchsynergypress.com/index.php/jess/article/view/3820. Acesso em: 1 apr. 2026.