OLANIYI, N. E. E. Threshold concepts: designing a format for the flipped classroom as an active learning technique for crossing the threshold. Research and Practice in Technology Enhanced Learning, [S. l.], v. 15, 2020. Disponível em: https://rptel.apsce.net/index.php/RPTEL/article/view/2020-15002. Acesso em: 8 sep. 2024.