DARMIYATI, D.; SUNARNO, S.; PRIHANDOKO, Y. The effectiveness of portfolio assessment based problem based learning on mathematical critical thinking skills in elementary schools. International Journal of Curriculum Development, Teaching and Learning Innovation, [S. l.], v. 1, n. 2, p. 42–51, 2023. DOI: 10.35335/curriculum.v1i2.65. Disponível em: https://trigin.pelnus.ac.id/index.php/Curriculum/article/view/65. Acesso em: 24 may. 2026.