<p>I’m not clear what you are trying to teach them? Would it matter if you (the teacher) were the parent v. an instructor v. school personnel? Perhaps you wouldn’t all teach the same thing, and perhaps you shouldn’t. </p>
<p>I think cheaters usually win in the end. It is so common - in school, and in life - that most folks don’t even think of it as cheating. </p>
<p>There are other options, like turning yourself in for refusing to report cheating. That meets virtually all ethical requirements.</p>