Legislators! Pass laws that allow schools to deal with students with unmanageable conduct. Sorry, some people cannot be helped and they disrupt the classroom for those who want to learn. If you can't throw the disruptors out, put them all in a big room called Special First Grade and leave them there until they are old enough to expel. Don't promote them to second grade.
“....put them all in a big room called Special First Grade ....”
Room locked and if necesary chained to their seat!