“63. Peningkatan Hasil Belajar Materi Waktu Melalui Model Pembelajaran Problem Based Learning Berbantuan Alat Peraga Siswa Kelas II SDN 1 Samirejo ”. 2023 1 (1): 570-77. https://conference.upgris.ac.id/index.php/psnppg/article/view/3976.