I have an adult relative who paces with gestures like this. He is acting out scenarios while pacing. For him, what keeps it under control and in his seat at work is the high intensity of exercise he does daily. He says that he paces more when he does not run or workout in the gym. I am wondering if enrolling your son in a daily sport that is rigorous like martial arts or swim team might help alleviate the need to pace during recess. It is worth a try and if it does not work, you can either continue with it or drop it as per his preference. Good luck.
