MERRILL, M. D. A 50+ year search for effective, efficient and engaging instruction. Education Review, [S. l.], v. 24, 2017. DOI: 10.14507/er.v24.2220. Disponível em: https://edrev.asu.edu/index.php/ER/article/view/2220. Acesso em: 27 apr. 2024.