Bongajum Dora Lemnyuy, B. D. L., & Patrick Sama-Lang, P. S.-L. (2026). MOTIVATION AS AN INGREDIENT FOR EFFECTIVENESS AND EFFICIENCY IN THE TEACHING AND LEARNING ENTERPRISE OF THE PRESBYTERIAN EDUCATION AUTHORITY (PEA). International Journal of Developmental Issues in Education and Humanities, 2(3), 120-143. https://doi.org/10.5281/