Devotha B. Mchami. “Evaluating the Influence of Professional Development on Teacher Engagement and Educational Quality in Secondary Schools: A Study of Mbeya District”. Research and Review: Human Resource and Labour Management (p-ISSN: 3049-4125) 6, no. 1 (February 10, 2025): 25–35. Accessed June 18, 2026. https://www.matjournals.net/engineering/index.php/RRHRLM/article/view/1399.