THE ROLE OF THE PRINCIPAL AS A MANAGER IN IMPROVING THE QUALITY OF EDUCATION BASED ON THE VALUES OF PANCASILA: STUDI SYSTEMATIC LITERATURE REVIEW. Jurnal Merah Putih Sekolah Dasar, The Indonesian Journal of Primary School Education 2026, 2 (2), 172-178. https://doi.org/10.24114/jmpsd.v2i2.70407.