Penggunaan Strategi Problem Based Learning dalam Meningkatkan Kemampuan Pemecahan Masalah Matematika Siswa Kelas 2 SD. IEC: Journal of Educational Innovation, [S. l.], v. 2, n. 3, p. 114–122, 2026. Disponível em: https://research.iecjournal.com/index.php/IEC-JEI/article/view/58.. Acesso em: 24 sep. 2026.