If a teacher is dressed like a student, a student will...
must teacher's also wear school uniform
Imagine that a class is sitting at their desks waiting for their class to begin when their teacher walks in wearing old sweatpants and a stained tank-top. Would you imagine that those students would listen to the teacher or take the teacher seriously?. If a teacher is dressed like a student, a student will treat the teacher like one. Vice versa, if a teacher is dressed like a grown up or an authority figure, a student will treat them like one. A student is more likely to listen to a teacher who is wearing a professional-like outfit than a teacher who is dressed sloppy.