Tumsuk, S., Tawee, S. and Suntawan, T. 2025. The Relationship between Transformational Leadership of School Administrators and Teaching Efficiency of Teachers under the Office of Nakhon Sawan Primary Education Service Office Area 1. Education journal Faculty of Education, Nakhon Sawan Rajabhat University . 8, 2 (Jun. 2025), 76–90. DOI:https://doi.org/10.2774.EDU2025.2.273415.