This study investigates the organizational-pedagogical mechanisms that enhance the effectiveness of professional development hours (PDH) within secondary and higher educational institutions. Drawing on a mixed-methods research design involving 312 educators across 18 schools and universities in Uzbekistan, the study identifies key structural, methodological, and motivational factors that determine the quality of PDH outcomes. The findings indicate that the integration of reflective practice, peer collaboration, differentiated learning athways, and systematic administrative support significantly improves teacher competencies and instructional performance. The article proposes a conceptual framework comprising five interconnected mechanisms: (1) goal-oriented planning, (2) interactive instructional formats, (3) digital resource integration, (4) feedback and assessment systems, and (5) institutional culture fostering continuous learning. Practical recommendations are provided for educational administrators seeking to edesign PDH structures in alignment with modern pedagogical standards and national educational policy