YULIATIN, ISTIN. UPAYA MENINGKATKAN HASIL BELAJAR MATEMATIKA MELALUI PENERAPAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING MATERI UKURAN TENDENSI SENTRAL PADA SISWA KELAS XII IPA SMA NEGERI 1 DEKAI. SECONDARY: Jurnal Inovasi Pendidikan Menengah , [S. l.], v. 3, n. 1, p. 31–37, 2023. DOI: 10.51878/secondary.v3i1.1940. Disponível em: https://jurnalp4i.com/index.php/secondary/article/view/1940. Acesso em: 22 apr. 2026.