LUCAS, C. W. TEACHING MIXED ABILITY CLASSES (Author: A. V. Kelly). McGill Journal of Education / Revue des sciences de l’éducation de McGill, Montreal, QC, v. 13, n. 001, 1978. Disponível em: https://mje.mcgill.ca/article/view/7187. Acesso em: 23 nov. 2020.