Nadia Sari Putri and By Tri Agung Nusantara Kr. J. Tompong 2025. Classroom Action Research as a Means of Improving Teacher Professionalism and Learning Quality in the Digital Age. Gateway for Understanding Research in Education. 1, 1 (Aug. 2025), 39–47. DOI:https://doi.org/10.69855/guru.v1i1.211.