Nainggolan E. 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 [Internet]. 2022 Jun. 8 [cited 2025 Feb. 23];6(1):107-21. Available from: http://ojs.uph.edu/index.php/JOHME/article/view/4527