DORIMANA, A. .; UWORWABAYEHO, A. .; NIZEYIMANA, G. . Enhancing Upper Secondary Learners’ Problem-solving Abilities using Problem-based Learning in Mathematics. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 21, n. 8, p. 235–252, 2022. Disponível em: http://www.ijlter.myres.net/index.php/ijlter/article/view/1391. Acesso em: 31 jan. 2026.