NUSANTORO, Khara Kharizesthai Princess; SANOTO, Herry. THE EFFECT OF THE PROBLEM BASED LEARNING MODEL USED BY KOBELKA CONCRETE MEDIA AND THE IMPLEMENTATION OF CLASS MANAGEMENT ON THE NUMERATION SKILLS OF GRADE III STUDENTS. SOSIOEDUKASI : JURNAL ILMIAH ILMU PENDIDIKAN DAN SOSIAL, [S. l.], v. 15, n. 2, p. 1418–1435, 2026. DOI: 10.36526/sosioedukasi.v15i2.8198. Disponível em: https://ejournal.unibabwi.ac.id/index.php/sosioedukasi/article/view/8198. Acesso em: 1 jun. 2026.