PENINGKATAN PEMAHAMAN KONSEP MATEMATIS MELALUI PENERAPAN MODEL PEMBELAJARAN TREFFINGER BERBANTU BAHAN AJAR ALQURUN (Improving the Understanding of Mathematic Concepts through the Application of Treffinger Learning Model Assisted with Alqurun Teaching Materials) - Yulinsa, Hezvi (Center for Research and Publication Universitas Islam Negeri (UIN) of Ar-Raniry, 2021)