[ 경향신문 ] On June 3 , 1 . 7 million students in grades three , four , eight and ten begin offline classes in schools . But cluster transmission of COVID - 19 continues sporadically in the Seoul metropolitan area , and private educational institutions have emerged as a major channel of transmission in the local community , so schools remain on alert . Students also experienced problems logging on to a self - diagnosis website , where they are checked for any suspected symptoms of COVID - 19 before going to school , as the number of those trying to log on increased after schools opened their doors to more students . According to the educational circle on June 2 , this morning , students were not able to smoothly log on to the self - diagnosis website in some areas , such as Gyeonggi and Incheon . Students in Seoul also suffered problems accessing the website the previous day . The problems were caused as students in grades five , six and seven began logging on to check their conditions as they prepare to start offline classes in schools , which will begin on June 8 . Oh ( 46 ) , a parent of a student living in the Gyeonggi area said , “ I ’ m worried that the self - diagnosis will end up a formality , since people keep having trouble accessing the site . ” Such concerns were triggered after the nation witnessed an increase of COVID - 19 - positive patients related to students . Recently , COVID - 19 cases were confirmed in private educational institutions in Yeouido , Mok - dong , and Mapo in Seoul , followed by a person on night duty at an elementary school in Seongbuk - gu . As of 10 a . m . this day , 534 kindergartens and schools have postponed opening their doors , and the majority of these institutions were located in the Seoul metropolitan area . The government plans to announce stronger quarantine measures for private educational facilities , such as the introduction of an electronic visitor log using QR codes as early as June 3 . ▶ 장도리 | 그림 마당 보 기 ▶ 경향신문 바로 가 기 ▶ 경향신문 구독 신청 하 기 © 경향신문 ( www . khan . co . kr ) , 무단 전재 및 재 배포 금지