HENDRI, Hendri; FIRDAUS, Fery Muhamad. The Effectiveness of Problem Based Learning in Improving the Cognitive Abilities of Elementary School Students. Juwara: Jurnal Wawasan dan Aksara, [S. l.], v. 6, n. 1, p. 13–26, 2026. DOI: 10.58740/juwara.v6i1.781. Disponível em: https://jurnal.smpharapanananda.sch.id/index.php/juwara/article/view/781. Acesso em: 20 may. 2026.