RAGGL, A. Teaching in Mixed Aged Classes in Small Rural Schools. Swiss Journal of Educational Research, [S. l.], v. 34, n. 2, p. 285–302, 2012. DOI: 10.24452/sjer.34.2.4884. Disponível em: https://sjer.ch/article/view/4884. Acesso em: 20 apr. 2024.