The Role of Transformational Leadership and Competency Development of Teachers and Educational Staff in Improving School Performance. International Journal of Social Sciences, Language, and Education, [S. l.], v. 1, n. 3, p. 87–98, 2026. DOI: 10.65310/ds1pb204. Disponível em: https://researchfrontiers.id/didakta/article/view/248. Acesso em: 3 sep. 2026.