I think there should be some check on this, but if a class decides to throw the exam in order to screw the teacher, the teacher probably sucks. Also, if each s

I think there should be some check on this, but if a class decides to throw the exam in order to screw the teacher, the teacher probably sucks. Also, if each students score is part of their record, there is an incentive to not throw the test even if the teacher is hated.