<![CDATA[This study aims to analyze the effects of madrasah principal leadership, compensation, and teamwork on teacher professional development at Madrasah Tsanawiyah (MTs) across Ulu Barumun District, Padang Lawas Regency.. This study employed a quantitative approach using a survey method. The population consisted of all 75 teachers at Madrasah Tsanawiyah institutions across Ulu Barumun District, and the entire population was included as the research sample using a total sampling technique. Data were collected through questionnaires that had been tested for validity and reliability. The data were analyzed using descriptive and inferential statistical techniques, including multiple linear regression analysis, preceded by prerequisite tests, as well as partial (t) tests, simultaneous (F) tests, and the coefficient of determination (R²). The results showed that: (1) madrasah principal leadership had a positive and significant effect on teacher professional development; (2) compensation had a positive and significant effect on teacher professional development; (3) teamwork had a positive and significant effect on teacher professional development; and (4) madrasah principal leadership, compensation, and teamwork simultaneously had a positive and significant effect on teacher professional development at Madrasah Tsanawiyah institutions across Ulu Barumun District. 48.0% was attributable to other factors not examined in this study. Based on these findings, improving teacher professional development requires effective madrasah leadership, a fair and adequate compensation system, and a strong culture of teamwork. These three factors should be strengthened in an integrated manner to enhance the quality of human resources and educational outcomes at Madrasah Tsanawiyah institutions.]]>
