History of professional education, middle school and its political conjuncture. Research, Society and Development, [S. l.], v. 8, n. 8, p. e23881207, 2019. DOI: 10.33448/rsd-v8i8.1207. Disponível em: https://rsdjournal.org/rsd/article/view/1207. Acesso em: 5 dec. 2025.