Assuming the vest is because he's a runner, this is a hard one. As a teacher, the physical safety of my students is the top priority above emotional safety or learning. Don't get me wrong, emotional safety and learning are very important, but if I had to choose, it would have to be for physical safety. The problem for autistic students in gen ed settings, though, is that gen ed teachers, special ed teachers, aids, guidance counselors, and admin really don't understand autism. No one there knows I'm autistic, but I interject when I can to help the students who also are. Other staff doesn't get that the same punishments as for NTs don't work, like restricting something fun until the kids reflects on their behavior. IEPs are not that helpful, they say the same thing for pretty much every kid who has one. 1:1 is definitely ostracizing, and even then, aids are trained to help with learning deficits, not autistic behavior. Whoever said above to find out why he is a runner is on the best track. I find I can calm a lot of behavior with unruly autistic students by being very explicit. On the other hand, I am not good with the mind games needed for unruly NT students and leave that as much as possible to the NT teachers...