What is a busier environment a psychiatric admissions unit or a primary school classr

Kilduffyras1

I have a friend who is a qualified primary school teacher and she is hoping to quite it and pursue psychiatric nursing (my mom is a psychiatry nurse).
We had a discussion on what is a busier environment last night. She reckons you cannot get busier then a classroom full of kids, my mother says a psychiatric unit is so unpredictable, and dealing with doctors etc on a regular basis makes it's non stop. My friend thinks shes leaving a busy environment to go into a more relaxed environment which is what she wants!
Opinions on this please as I, as a shop assistant always considered nursing and teaching and may look at both options in a few years.
Thanks