YONES AL-AZOW, E. Efficiency of two Patterns of Presenting Algebraic concept in achievement and developing mathematical thinking for first grade students at the department of mathematics. College of Basic Education Research Journal, [S. l.], v. 9, n. 3, p. 115–139, 2010. Disponível em: https://stats.uomosul.edu.iq/index.php/berj/article/view/38544. Acesso em: 26 oct. 2025.