<![CDATA[This paper explores the challenges of teacher professional development within Cambodian public upper secondary schools, driven by low teacher qualifications, resource gaps, and cultural barriers. Using an integrative literature review and qualitative document analysis, this paper synthesizes 58 sources, including official Cambodian regulatory frameworks, global evaluations, and empirical studies. By synthesizing local policy with international PLC models from Japan, South Korea, and Singapore, this study reveals a substantial gap between national policy goals and local school conditions. To bridge this divide, the article presents a contextually adapted four-pillar conceptual framework alongside actionable strategies to support effective PLC implementation across Cambodian upper secondary schools.]]>
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