In some cases, the biggest difficulty for an English-language learning student is simply getting the necessary classwork online.

在某些情况下，学习英语的学生最大的困难就是在网上获取必要的课堂作业。

She seems to have some difficulty with the classwork.

她对作业好像感到很困难。

And there is no limit to the creativity it can add to classwork.

可以为课堂作业带来无限的创造力。

In addition to classwork, you are supposed to put in 3-4 hours a day of private study.

除了课堂作业以外，你们每天要进行三至四个小时的自学。

Somebody complained to you that I had written my classwork in disconnected letters.

有你抱怨我的课堂作业是用不连贯的字母写的。

She hired me based on my classwork.

她雇我是因为我的课堂作业很棒。

So, if a student is enrolled in 15 credit hours, they can expect to spend 15 hours a week in class and 15 to 30 hours per week on classwork.

因此，如果一个学生报名参加了15个学分的课程，那么他们可以预期到每周要花15个小时在课堂上，花15到30个小时在课堂作业上。