"Giving students a dedicated spot in the classroom to collect themselves helps them learn to manage their emotions - a valuable life skill."
I particularly found the set up of the quiet zone useful: one student at a time, no more than five minutes in the quiet zone, not punitive, don't need a reason to go there, etc. I have seen students do things like ask for a drink or sharpen their pencil just to have a chance to walk around. This is an organized way for students to take a short break.