Problem Based Learning Models to Numeracy Literacy Skills : A Study in Elementary School. Journal of Education and Teacher Training Innovation, [S. l.], v. 1, n. 1, p. 1–10, 2023. DOI: 10.61227/jetti.v1i1.4. Disponível em: https://journal.pusmedia.com/JETTI/article/view/4. Acesso em: 23 apr. 2026.