Teacher performance plays a crucial role in determining the quality of the teaching and learning process and achieving educational goals. Therefore, understanding the factors that influence teacher performance is essential for improving school effectiveness. This study aims to examine the effects of motivation and work discipline on teacher performance, both partially and simultaneously, at Mater Dei Pamulang Junior High School, South Tangerang. This research employed a quantitative approach using a saturated sampling technique, in which all 40 teachers were selected as respondents. Primary data were collected through a structured questionnaire and analyzed using the Statistical Package for the Social Sciences (SPSS) version 20. The analytical techniques included instrument testing (validity and reliability), classical assumption tests, multiple linear regression analysis, correlation analysis, coefficient of determination analysis, and hypothesis testing using t-tests and F-tests. The findings indicate that both motivation and work discipline have a significant positive effect on teacher performance, both individually and simultaneously. Teachers with higher levels of motivation and stronger work discipline tend to demonstrate greater responsibility, commitment, professionalism, and work quality. The study implies that school management should implement strategies to enhance teacher motivation through recognition and professional development while fostering a strong culture of work discipline to improve teacher performance and support continuous educational quality improvement.
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