Despite this teacher's miraculous extraction of some character growth from a handful of the cheaters, I still think he should have just failed all of them as soon as he had an airtight case against them. There is no moral or practical justification for tolerating cheaters. They make a mockery of honest students and the higher education as a whole. They're a menace to the society into which they're released with a stamp of approval they have stolen rather than earned. They deserve only failure and humiliation, and if they consistently received it there would be far fewer of them.
We must assume they don't care about learning, so if we want to cram some knowledge into them anyway, hit them the only place they apparently care about: their transcript. Either they'll shape up or be rightfully denied the (ever more scant) honor of a degree. The heroics of the author here cannot be scaled, and we shouldn't be asking anyone to go to that extent. Just fail the bastards. You're only recording what's already true.
We must assume they don't care about learning, so if we want to cram some knowledge into them anyway, hit them the only place they apparently care about: their transcript. Either they'll shape up or be rightfully denied the (ever more scant) honor of a degree. The heroics of the author here cannot be scaled, and we shouldn't be asking anyone to go to that extent. Just fail the bastards. You're only recording what's already true.