Hamdan, and Lia Yuliana. “The Influence of Principals’ Managerial Competence, Academic Supervision and Teachers’ Education Level on the Performance of Public Junior High School Teachers in Kuala Kampar Sub-District”. International Journal of Educational Technology Research, vol. 3, no. 1, May 2025, pp. 318-33, doi:10.59890/ijetr.v3i1.582.