Peningkatan hasil belajar matematika melalui model pembelajaran Problem Based Learning berbantuan media konkret siswa kelas 1 SDN Sawah Besar 01. jpgp [Internet]. 2025 Jun. 10 [cited 2025 Oct. 14];3(1):1-7. Available from: https://journal2.upgris.ac.id/index.php/jpgp/article/view/1690