R. A. Balbuena, “Multimodal Instruction for Grade 9 Earth Science: Enhancing Mastery of Least-Learned Competencies at Cabancalan National High School”, Int. Multidiscip. J. Res. Innov. Sustain. Excell. , vol. 4, no. 9, pp. 95–105, Aug. 2026, Accessed: Aug. 26, 2026. [Online]. Available: https://risejournals.org/index.php/imjrise/article/view/1752