Implementation of Problem Based Learning Model in 21st Century Learning: Literature Review. Journal of Basic Education Research, [S. l.], v. 6, n. 1, p. 1–8, 2025. DOI: 10.37251/jber.v6i1.1315. Disponível em: https://cahaya-ic.com/index.php/JBER/article/view/1315. Acesso em: 20 may. 2026.