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Teacher Sim Chan-woo's lectures and contents can be found both online and offline. ■ Online lecture Orbi Class / Korean language area → https://class.orbi.kr/teacher/94 ■ Offline lecture Megastudy Russell (single subject) → https://russel.megastudy.net/intro/ga... Russell (Daechi, Bundang, Mokdong, Centum, Ulsan, dormitory) Russell Core Live (Daegu, Gwangju)