MULIA, Fitri. Peningkatan Hasil Belajar Penjumlahan dan Pengurangan Kelas 2 SD Negeri Sawah Besar 01 melalui Problem Based Learning Berbantuan Media Kongkret. Prosiding Seminar Nasional Pendidikan Profesi Guru, [S. l.], v. 1, n. 2, p. 2525–2533, 2023. Disponível em: https://conference.upgris.ac.id/index.php/psnppg/article/view/5409. Acesso em: 5 dec. 2025.