Tendongmoh, F.B. and Didimus, Z.A. 2023. Teacher’s Professional Development and Internal Efficiency in Cameroon: A case study of Some Primary Schools in Nyong and Mfoumou Division. Canadian Journal of Educational and Social Studies. 3, 3 (May 2023), 10–25. DOI:https://doi.org/10.53103/cjess.v3i3.140.