COOPER STAPP, Alicia; KARR, Jenny Kate. 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: 9 aug. 2026.