Marinda and Lantip Diat Prasojo 2025. The Effect of Principal’s Academic Supervision, Teacher Professional Learning Community Activities, and Teacher Professional Competence on State Vocational High School Teachers’ Performance in Indragiri Hilir Regency. International Journal of Educational Technology Research. 3, 1 (Mar. 2025), 1–14. DOI:https://doi.org/10.59890/ijetr.v3i1.394.