INFLUENCE OF PRINCIPALS’ PROVISION OF OPPORTUNITIES FOR PROFESSIONAL DEVELOPMENT ON TEACHER PERFORMANCE IN PUBLIC SECONDARY SCHOOLS IN SAKU SUB-COUNTY, MARSABIT COUNTY, KENYA. AJOEI [Internet]. 2023 Sep. 1 [cited 2025 Sep. 11];5(12):73-86. Available from: https://ajoeijournal.org/sys/index.php/ajoei/article/view/468