Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
교장론은 교육 시스템에서 중요한 역할을 한다.gyojangnon-eun gyoyuk sistemaeseo jungyohan yeoghal-eul handa.The theory of school principals plays an important role in the education system.