The Effect of the (P.E.C.S) Strategy on Mathematics Learning Efficiency Among Fifth Scientific Grade Students. College of Basic Education Research Journal, [S. l.], v. 22, n. 3, p. 274–297, 2026. DOI: 10.33899/berj.2026.Vol22.Iss3.62937. Disponível em: https://berj.uomosul.edu.iq/index.php/berj/article/view/62937. Acesso em: 8 sep. 2026.