Cutamora, M. (2026) “Predictive Influence of Teacher Challenges and School Head Support on Teaching Effectiveness in Multigrade Classrooms in Lingig I District, Division of Surigao Del Sur: A Descriptive-Correlational Study”, International Journal of Education, Research, and Innovation Perspectives, 2(2), pp. 30–60. doi:10.5281/zenodo.18475572.