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
이 시범학교는 새로운 교육 방법을 시험하고 있습니다.I sibeom hakgyoneun saeroun gyoyuk bangbeob-eul siheomhago issseubnida.This demonstration school is testing new teaching methods.