“PENINGKATAN HASIL BELAJAR MATEMATIKA MATERI BANGUN RUANG MELALUI MODEL PROJECT BASED LEARNING BERBANTUAN MEDIA KERTAS KARTON PADA PESERTA DIDIK KELAS V SDN PUTAT JAYA IV-380 SURABAYA” (2025) Journal of Mathematics Education Research, 4(1). Available at: https://journalng.uwks.ac.id/jmer/article/view/493 (Accessed: 1 July 2025).