It’s not just the a student or some students but the entire class is unruly. So what can we do about that? It is plain failure of leadership on the part of the teacher although there is an argument that some students are so rebellious that they convince the other students to join the mischief of not listening to the teacher. There were some cases when the teacher would quit and the replacement would also quit. What do you think is the best solution for such students whose aim is to terrorize the teacher?