The Impact of using Cooperative Learning Jigsaw strategy On the Students Achievement of First Year Teachers Training Institute. College of Basic Education Research Journal, [S. l.], v. 10, n. 1, p. 21–47, 2011. DOI: 10.33899/berj.2011.Vol10.Iss1.38629. Disponível em: https://berj.uomosul.edu.iq/index.php/berj/article/view/38629. Acesso em: 22 aug. 2026.