Mattoliang, L.A., Sappaile, B.I. and Asdar, A. 2026. Integrating APOS Theory and Scaffolding in Islamic Boarding Schools: The Conceptual Design and Validation of APOSCAF Learning Model. International Journal of Education, Vocational and Social Science . 5, 02 (Mar. 2026), 16-26. DOI:https://doi.org/10.63922/ijevss.v5i02.3024.