"The impact of the bar modeling strategy on the algebraic thinking skills of middle-grade second-graders in mathematics ". Journal of the College of Basic Education, [S. l.], v. 1, n. عدد خاص, p. 516–532, 2024. DOI: 10.35950/cbej.v1iعدد خاص.11903. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/11903.. Acesso em: 3 jul. 2025.