This study aims to examine the effect of school principal management, which includes planning, organizing, directing, and supervising, on the work discipline of teaching and educational staff at SMPN 41 Tanjung Jabung Barat. This study employs a quantitative approach using a survey method. The sample consisted of 16 teaching and educational staff members selected through the total sampling technique. Data were collected using a Likert-scale questionnaire and analyzed with SPSS version 26.0. The results showed that planning had a significant effect on work discipline (significance value of 0.021), organizing had a significant effect (0.015), directing had a significant effect (0.018), and supervising had a significant effect (0.009). Simultaneously, the four school principal management variables had a significant effect on the work discipline of teaching and educational staff, with an F-value of 14.672 and a significance value of 0.001. The coefficient of determination (R²) was 0.847, indicating that 84.7% of the variation in work discipline could be explained by the school principal management variables, while the remaining 15.3% was attributable to other factors outside the scope of this study.
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