Initial Development of Mathematical Grit Scale for Senior High School. Indonesian Journal of Education Research (IJoER), [S. l.], v. 7, n. 3, p. 261–269, 2026. DOI: 10.37251/ijoer.v7i3.2569. Disponível em: https://cahaya-ic.com/index.php/IJoER/article/view/2569. Acesso em: 15 jun. 2026.