This research aims to investigate the improvement of students' creativity and learning outcomes on the topic of Sanctifying the Church through the implementation of the Problem-Based Learning (PBL) method in Phase F at SMAN 1 Siluq Ngurai. The study adopts a reflective classroom action research design. The subjects of the research are students of class XI in Phase F at SMAN 1 Siluq Ngurai. Data collection involves observation and tests, and the obtained data are analyzed descriptively. The research findings reveal that the application of the Problem-Based Learning (PBL) model enhances both creativity and learning outcomes of students on the topic of Sanctifying the Church in Phase F at SMAN 1 Siluq Ngurai. This is evidenced by the test results at the end of each cycle, where the score increased from 84% in cycle 1 to 87% in cycle 2. Similar improvements are observed in other indicators. Overall, there is an increase in the average indicator from 77% in cycle 1 to 81% in cycle 2. The students' learning achievements also improved, with the number of students classified as proficient increasing from 83 (25%) in cycle 1 to 5 (42%) in cycle 2. The number of students classified as achieving a satisfactory level decreased from 4 (33%) to 2 (17%). This indicates an improvement of 3 students becoming proficient.
