I used to be a Kindergarten teacher. Really. I managed to take 25 four and five year olds, many of whom had never had any structured school experience, and turn them into students. They learnt taking turns, speaking respectfully, listening and general associated behaviours that are acceptable in the classroom environment.
Now I am a youth pastor, and I have older children, who have been in structured environments for years and know what is expected of them. So being very new to this game this is what I insisted on from the start, polite, respectful behaviour, in all circumstances.