This study aims to analyze and describe the principal's managerial skills in improving the quality of learning at SMA Negeri 1 Tanjung Raja. The study uses a qualitative approach with descriptive methods. Data collection techniques were carried out through observation, interviews, and documentation, with informants consisting of the principal, vice principal, teachers, and students. The focus of the study covers four managerial functions of the principal, namely planning, organizing, implementing, and supervising. The results of the study indicate that the principal has carried out managerial functions effectively. In the planning aspect, the learning program is arranged systematically and based on school needs. In the organizing aspect, the division of tasks and coordination runs well so as to support the smooth learning process. In the implementation aspect, the principal is able to motivate and motivate teachers through academic supervision activities, training, and professional development. The study involved nine purposively selected informants consisting of one principal, three vice principals, three teachers, and two students. Data were analyzed using the interactive model of Miles, Huberman, and Saldana involving data condensation, data display, and conclusion drawing. Meanwhile, in the supervision aspect, the principal consistently conducts evaluations and follow-ups for continuous improvement. The findings of this study indicate that the principal's managerial skills play a significant role in improving the quality of learning, which is characterized by increased teacher performance, the effectiveness of the learning process, and student achievement. Therefore, strengthening the principal's managerial competence is an important factor in efforts to continuously improve the quality of education.
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