Examining the Effectiveness of Multiple Representation (SiMaYang) Learning Model on Students’ Mathematical Conceptual Understanding: The Role of Self-Efficacy. Interval: Indonesian Journal of Mathematical Education, [S. l.], v. 4, n. 1, p. 20–25, 2026. DOI: 10.37251/ijome.v4i1.3064. Disponível em: https://cahaya-ic.com/index.php/IJoME/article/view/3064. Acesso em: 3 jun. 2026.