This study aims to analyze the impact of the Professional Learning Community (PLC) on the quality of learning in Nusantara Capital Buffer Schools (IKN). A mixed-method approach, combining qualitative and quantitative elements, was employed to understand the phenomenon comprehensively. The results indicate a significant improvement in learning outcomes, as evidenced by the increase in the average post-test score (70) compared to the pre-test score (48.75). The PLC program provided a platform for teachers to collaborate, share insights, and develop effective strategies to address learning challenges. Furthermore, implementing the PLC fostered a more supportive school environment, making students feel more comfortable and engaged. The findings underscore the importance of enhancing and expanding PLC initiatives to improve students' academic and non-academic achievements. Practically, these results suggest that the PLC model can be a valuable tool for teacher development and improved student outcomes. Academically, this study contributes to the growing literature on collaborative learning environments and their role in enhancing educational quality.