I do not agree with this story involved. Even if they are wearing a helmet to prevent stripping the exams, but if one of them is fraud on the exam. I think that you'll give them their hats, they will still find a way in corruption, such as writing an answer, put the paper into small exam room, or to secretly write down the answers down on a part of their body by nobody knows. , Etc., however, I think a good test fraud prevention is to educate, they are true to themselves in the exam.
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