The effect of cooperative learning on biology achievement and bullying behavior among second grade students. Journal of the College of Basic Education, [S. l.], v. 21, n. 89, p. 225–248, 2022. DOI: 10.35950/cbej.v21i89.6583. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/6583.. Acesso em: 4 jul. 2024.