PENINGKATAN KEMAMPUAN PEMECAHAN MASALAH MATEMATIS PESERTA DIDIK MELALUI IMPLEMENTASI MODEL PROBLEM BASED LEARNING DENGAN PENDEKATAN TEACHING AT THE RIGHT LEVEL BERBANTU LKPD. psnppg. 2024;2(1):1-12. Accessed August 13, 2026. https://conference.upgris.ac.id/index.php/psnppg/article/view/6240