Sometimes when a student is acting out, you
address their behavior publicly, but sometimes its better to do it privately. Here's the scenario: students are completing an assignment, and you asked the students to work on
a separate sheet of paper instead of trying to show their work on the half
sheet that has the problems printed on it. In the middle of class, after
writing a few hints on the board, you notice a student is writing their work on
this half sheet. You address the student publicly and make
a statement along the lines of "You better copy that work onto
another sheet because I will not be grading that", and the student looks
visibly upset. Similar situations have happened with this same student
and each time he looks more and more upset, when is it time to speak with him
privately or will changing the way you address the problem publicly be enough?