The Principal’s Strategy in Improving the Quality of Teacher Competence at Senior High School: Strategi Kepala Sekolah Dalam Meningkatkan Kualitas Kompetensi Guru Di SMA. acopen 2022, 6, 10.21070/acopen.6.2022.2287. https://doi.org/10.21070/acopen.6.2022.2287.