Salviejo, Edwin I., Fidela Q. Aranes, and Allen A. Espinosa. “Strategic Intervention Material-Based Instruction, Learning Approach and Students‘ Performance in Chemistry”. International Journal of Learning, Teaching and Educational Research 2, no. 1 (February 28, 2014): 91–123. Accessed April 19, 2026. http://www.ijlter.net/index.php/ijlter/article/view/1216.