
Of course, a teacher must set the tone in order to maintain effective classroom management. However, when "setting the tone", it is easy to get angry at students, and unfortunately, that anger will create more problems in the classroom.
It is very important that teachers do not "lose it" no matter how much a student tests you. If students see that they have angered you, they know they have beaten you at the discipline game. The bottom line is, you must control your anger if you want to be an effective teacher.
Here are some things to think about that may help: