Handa Maya Sari, M. Ikhsan and Usman 2023. IMPROVING MATHEMATICAL UNDERSTANDING THROUGH ACTION, PROCESS, OBJECT AND SCHEMA BASED DISCOVERY LEARNING MODEL. Multidiciplinary Output Research For Actual and International Issue (MORFAI). 3, 3 (Oct. 2023), 849–852. DOI:https://doi.org/10.54443/morfai.v3i3.2519.