This study was prompted by the suboptimal academic performance of students at the Salafiyah Syafiiyah Nurul Islam Islamic Boarding School in Sepangkor Besar, Sumenep Regency. Data from the Grade Report (DKN) for the past five semesters has not yet met the boarding school’s target range of 89–100. Furthermore, the students’ spirit of learning has been inconsistent in their participation in learning activities. This study aims to analyze the role of the spirit of learning in mediating the effects of transformational leadership and the boarding school environment on student achievement. This study employs a quantitative approach using explanatory research methodology. The study population consisted of 83 active students, all of whom were included in the sample using a saturation sampling technique. Data collection was conducted through questionnaires and interviews, and the data were then analyzed using PLS SEM with the SmartPLS 4 application. The results of the study found that transformational leadership and the pesantren environment have a significant effect on students’ spirit of learning and academic achievement. The spirit of learning has a significant effect on students’ academic achievement. Learning spirit also mediates the effects of transformational leadership and the pesantren environment on students’ academic achievement.
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