<![CDATA[This study aims to examine and analyze the influence of School principal leadership, work discipline, work climate, and work motivation on teacher performance at SMK NU Lasem. The research employs a quantitative approach using a survey method, in which all 48 teachers were included as the sample through a total sampling technique. Data were collected using a Likert-scale questionnaire and analyzed through multiple linear regression using SPSS version 25. The results of the study indicate that work discipline, work climate, and work motivation have a positive and significant effect on teacher performance, while principal leadership has a negative but insignificant effect. The determination test shows that the four independent variables together are able to explain the variation in changes in teacher performance by 69.4%, while the remaining 30.6% is influenced by other factors outside this study. These results confirm that high work discipline, a good work climate, and strong motivation are the keys to improving teacher performance in vocational school environments.]]>
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