I gave my students a take home exam over spring break. (This is normal where I teach) One of the questions was particulary difficult. It came down to a factor of three in the solution. That factor inexplicably appeared with no justification on many of their exams. I intend to have the students I suspect of cheating come to my office to solve the problem on the board. What would you do?
Did they cheat? You were lazy & let them take an exam at home. Sounds like you should’ve expected them to use any resources available. Just because something is normal, doesn’t mean it’s right.
I’m sure your students love you…
I don’t think that the best way to convince someone their way is wrong involves personally insulting them and sarcastically implying that they’re hated by their students