Phocas B, Andala DHO. Teachers Instructional Supervision and Students Academic Performance in Rwanda: A Case of Core Sciences Subjects in Lower Secondary Schools in Kayonza District. journal-of-education. 2020;3(4):21-36. Accessed November 14, 2026. https://stratfordjournalpublishers.org/journals/index.php/journal-of-education/article/view/547