YUMUL, Camille Joy A. Pedagogical Content Knowledge and Instructional Effectiveness of Public Junior High School Mathematics Teachers In Echague, Isabela. Student Journal of Technology and Educational Research (SJTER), [S. l.], v. 3, n. 1, p. 230–249, 2026. DOI: 10.65141/sjter.v3i1n15. Disponível em: https://cedjournals.com/index.php/sjter/article/view/100. Acesso em: 31 aug. 2026.