I hate the idea of 'islands' , purposefully isolating a child just feels wrong. Children being a distraction is going to happen when you force them to sit still for large amounts of time, it's a child. They want to be outside developing basic motor skills, or learning helpful social skills and learning how to talk to people. Isolating them is going to do nothing but hurt the child, it doesn't teach them, if anything they'll learn the wrong thing they'll learn that when you talk to your peers or ask questions or ask for help you get in trouble. That's Wrong. What they're learning is conform or else, do we really want children to learn not to stick out? I understand that the teachers job is to teach the class and when one student prevent's that they need to remove the child to resume the best possible learning environment, but if that's what it takes to make children learn maybe it's not the best environment in the first place.