PEHKONEN , E. On pupils’ reactions to the use of open-ended problems in mathematics. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 3, n. 4, p. 43–57, 1995. DOI: 10.7146/nomad.v3i4.146189. Disponível em: https://tidsskrift.dk/NOMAD/article/view/146189. Acesso em: 9 jan. 2025.