So, some teachers imagine their work must remind of work of a clown during a show.
Students' attention span worsened so badly that even listening to their teacher in focus for several minutes reveals as a very hard challenge.
Well, there is no surprise. After all, children's main objective in life is to have fun.
They do not care about their superior who imposes obedience, as far as the teacher is someone who kids admire and respect, because she or he shows respect back to them or - because of other positive reasons, such as reciprocity in trust.