professors can give prompt feedback to students' homework
出自-2013年6月阅读原文
The closeness this system cultivates is reinforced by the institution of "advisory" classes Teachers meet with students in groups of 25, five mornings a week, for open-ended discussions of everything from homework problems to bad Saturday-night dates.
出自-2012年6月阅读原文
They are e-mailing classmates to discuss and collaborate (合作) on homework.
出自-2010年12月听力原文