“Penerapan Model Problem Based Learning (PBL) Dalam Peningkatan Pemahaman Wujud Zat dan Perubahannya (Studi Kasus Kelas IV MI Muhammadiyah Blangpidie)”, Validitas, vol. 1, no. 2, pp. 213–222, Jun. 2025, Accessed: Dec. 11, 2025. [Online]. Available: https://journal.maysapublishing.com/index.php/Validitas/article/view/249