Optimization of Educational Quality Assurance Through Digital Observation: A PPEPP-Based Analysis of Nurul Jadid Senior High School. IEC-JEI [Internet]. 2026 Oct. 29 [cited 2026 Nov. 13];2(5):63-74. Available from: https://research.iecjournal.com/index.php/IEC-JEI/article/view/147