PENERAPAN PENDEKATAN CONCRETE PICTORIAL-ABSTRACT (CPA) UNTUK MENINGKATKAN SIKAP TANGGUNG JAWAB, KEMAMPUAN PENGUASAAN KONSEP, DAN KEMAMPUAN PEMECAHAN MASALAH MATEMATIKA DI SDS XYZ JAKARTA [THE APPLICATION OF THE CONCRETE-PICTORIAL-ABSTRACT (CPA) APPROACH TO IMPROVE RESPONSIBILITY, CONCEPTUAL UNDERSTANDING, AND MATHEMATICAL PROBLEM SOLVING SKILLS AT SDS XYZ JAKARTA]
JOHME: Journal of Holistic Mathematics Education