Ana, Khoirul, et al. “THE EFFECTIVENESS OF PROBLEM BASED LEARNING ASSISTED BY LANCER MEDIA IN IMPROVING ELEMENTARY SCHOOL STUDENTS’ CONCEPTUAL UNDERSTANDING OF THE HUMAN DIGESTIVE SYSTEM: Efektivitas Model Problem Based Learning Berbantuan Media LANCER Dalam Meningkatkan Pemahaman Konsep Materi Sistem Pencernaan Manusia Pada Siswa Sekolah Dasar”. Santhet (Jurnal Sejarah Pendidikan Dan Humaniora), vol. 10, no. 4, Aug. 2026, pp. 1693-02, doi:10.36526/santhet.v10i4.8942.