Principal Effects on Academic Progress Over Time and the Potential Effects of School Context and Principal Leadership Practices. Journal of School Administration Research and Development, [S. l.], v. 6, n. 1, p. 12–23, 2021. DOI: 10.32674/jsard.v6i1.3465. Disponível em: https://www.ojed.org/JSARD/article/view/3465. Acesso em: 7 mar. 2026.