<![CDATA[This study aims to describe and analyze the managerial characteristics of school principals in improving learning quality at SMA Negeri 1 Tanjung Raja. A qualitative case study design was employed, involving eleven informants selected purposively, including the principal, vice-principals, teachers, and administrative staff. Data were gathered through in-depth interviews, structured observation, and document review, then analyzed using the Miles and Huberman interactive model. Findings reveal five prominent managerial characteristics: data-driven program planning, proportional leadership distribution, coaching-oriented academic supervision, continuous quality evaluation, and facilitation of teachers' professional development alongside technology integration. Over three academic years, the mean final examination score improved by 10.6%, graduation rates reached 100%, and curriculum implementation rose from 78.5% to 91.6%. These results demonstrate that effective managerial characteristics of school principals make a tangible contribution to the sustained improvement of learning quality.]]>
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