The classroom environment is important for children. I have seen in my own experience with young children, that if a classroom is warm and welcoming as well as aesthetically pleasing, children will be more calm.  If the classroom has closed off space making it hard to travel from one center to the next, children will run around and will likely be bored.

You will notice that there is a take a break station.  This is a small area, with sensory tools, where children can take a moment to calm down if they are feeling any way that causes a distraction to learning.  This is placed near the door in the back of the room away from other so it is not distracting. 
During morning meeting, I will also address the take a break station to emphasize the appropriate use of the tools at the station.