Teaching of Mathematics with Concrete Materials: Qualitative Study on Using Four-Quadrant Algebraic Scales. Turkish Journal of Computer and Mathematics Education (TURCOMAT), [S. l.], v. 4, n. 1, p. 48–65, 2013. Disponível em: http://www.turcomat.org/index.php/turkbilmat/article/view/50. Acesso em: 3 jun. 2026.