Lakkham J, Charuchit P. Guideline for Developing Supervisory Skills of School Administrators under the Kalasin Provincial Office of Learning Encouragement. IARJ [internet]. 2026 Sep. 23 [cited 2026 Sep. 28];6(5):e299739 . available from: https://so03.tci-thaijo.org/index.php/IARJ/article/view/299739