Developing Mathematics Instructional Materials. Research, Society and Development, [S. l.], v. 8, n. 9, p. e15891236, 2019. DOI: 10.33448/rsd-v8i9.1236. Disponível em: https://rsdjournal.org/rsd/article/view/1236. Acesso em: 22 jan. 2026.