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Saturday.
Although the boarding students at No.11 High School had no classes, they were still scheduled to self-study in the classroom, following the normal curriculum.
Then, teachers from each subject would take turns supervising the classes.
However, since the upper management was strict about supervision for the first semester of sophomore year, they couldn't discuss problems, and were only responsible for overseeing like they were babysitting an evening tutoring class. If a student actively sought out a teacher, they would get some one-on-one explanations.
Not all teachers would come, though; they followed a schedule, and the comprehensive science teachers only came once every two weeks. Although there was some class fee involved, compared to the torment of giving up their personal time on weekends, teachers generally lacked enthusiasm. Not to mention, a regular class like Class 18, with an extremely low rate of students advancing to key universities.