Perceptions of High School Principals about Teacher Motivation in in the Metropolitan Area of Medellin, 2015. Revista Electrónica Educare, [S. l.], v. 21, n. 2, p. 1–23, 2017. DOI: 10.15359/ree.21-2.5. Disponível em: https://www.revistas.una.ac.cr/index.php/EDUCARE/article/view/7556.. Acesso em: 12 apr. 2025.