Quality and quality assurance in teacher professional development: A comparative study

This study examines teacher professional development processes from the perspectives of quality and quality assurance in Finland, the United States, Japan, and Germany. Adopting a qualitative approach, the research utilized the document analysis method. The data were sourced from national laws and regulations, policy documents, reports from international organizations, and peer-reviewed academic articles on teacher professional development and quality assurance published between 2004 and 2025. The analysis was conducted across three main dimensions: policy orientations, implementation mechanisms, and quality assurance tools. The findings indicate that Japan's emphasis on lifelong professional development and lesson study practices has fostered a strong professional learning culture. The U.S. demonstrates a multi-actor quality assurance system supported by standards, certification, and accreditation processes. Germany's federal structure relies on a cyclical quality management approach. In Finland, teacher autonomy and research-based teacher education are highlighted. The comparative analysis reveals similarities and differences in how these countries integrate teacher professional development with quality assurance. The findings reveal a range of balances between centralization and autonomy, supervision and guidance, and individual and collective learning. The study emphasizes that effective quality assurance mechanisms are critical in enhancing educational quality. Based on these findings, it is recommended that Turkey's policymakers strengthen quality assurance mechanisms in teacher professional development, expand practice-oriented training, and establish a flexible system responsive to local needs. It would be particularly beneficial for Turkey to examine and integrate approaches such as mentoring, peer learning, and performance-based feedback, as seen in these international examples.