On the danish site there has been a lot of copied homework where the wrong persons has been punished for it. The problem is, that ppl can grade every class they take themselve before they have made their homework in it. I think you should make your own homework before you can grade that single lesson, so instead of grading when you hve started a class, it should be when you have made your homework. So if you have only made your homework in Charms class 1 weak 7 and 8 it would also be the only lessons you can grade as a normal student.
//sorry bad english
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