When I was interning in a kindergarten classroom, there was one girl who was diagnosed with autism. She was five years old and non-verbal. When things seemed to upset her it was very clear though loud vocalizations and tantrums. The teacher requested to have 1-to-1 aide work with the student but it took months before receiving the help. During that time, teaching time was wasted due to the teacher having to redirect her attention to deal with that student. What kinds of tools could she have used to prevent these behaviors and not take away from the rest the class?
If I were in this situation, I would do exactly this. The student needs to be spoken to individually before additional measures need to be taken.
I would not do this, I do not think this will provide a permanent solution to the problem.