GILLESPIE, Astrid; BURNER, Tony. Principals’ views on the implementation of grade-free middle schools in Norway: justifications, challenges and opportunities. Nordisk tidsskrift for utdanning og praksis, [S. l.], v. 13, n. 2, p. 21–38, 2019. DOI: 10.23865/up.v13.1969. Disponível em: https://utdanningogpraksis.no/index.php/up/article/view/1969. Acesso em: 28 mar. 2024.