COOPER STAPP, A.; KARR, J. K. Effect of Recess on Fifth Grade Students’ Time On-Task in an Elementary Classroom. International Electronic Journal of Elementary Education, [S. l.], v. 10, n. 4, p. 449–456, 2018. Disponível em: https://iejee.com/index.php/IEJEE/article/view/365. Acesso em: 1 mar. 2025.