https://www.youtube.com/playlist?list=PL8QgbVpQuXeMzghcXvYM-nRof8t686NDZ
구글 클래스룸 매뉴얼 - YouTube
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https://www.youtube.com/watch?v=bSr7rspLUdQ&list=PL8QgbVpQuXeMzghcXvYM-nRof8t686NDZ&index=2&t=0s
https://www.youtube.com/watch?v=8QKO6wurruI&list=PL8QgbVpQuXeMzghcXvYM-nRof8t686NDZ&index=3&t=0s
https://www.youtube.com/watch?v=tmfHg2MqEdE&list=PL8QgbVpQuXeMzghcXvYM-nRof8t686NDZ&index=4&t=0s