Salvador, Jaqueline. “Determining the Influence of School Heads’ Instructional Leadership on the Professional Performance of Elementary Teachers in the Legislative District 6 of the Division of Isabela”. Student Journal of Technology and Educational Research (SJTER) 3, no. 1 (June 30, 2026): 195–213. Accessed July 16, 2026. https://cedjournals.com/index.php/sjter/article/view/86.