“Concrete Teaching Aids For Three Dimensional Geometry Comprehension In Elementary Education: Alat Peraga Konkret Untuk Pemahaman Geometri Tiga Dimensi Pada Pendidikan Dasar”, ijemd, vol. 21, no. 4, p. 10.21070/ijemd.v21i4.1156, Sep. 2026, doi: 10.21070/ijemd.v21i4.1156.