As a teacher, you have a certain amount of possibilities how to deal with classes. Or, of course, loud classes. You can be strict, using authority to keep everyone quiet, working with punishment and clear rules. You can also be somewhat indifferent, not really trying much, accepting that no one cares and not caring yourself. Or you can try to listen to your students and involve them in decisions. For each of these teaching methods there are many varieties again, so there are endless possibilities, in theory. Not surprisingly, I prefer the last method.