L.A.
Ask the teacher to place him alone in his own space so there is no one to talk to,
I remember being a talker in class, especially 3rd grade for some reason. . It was almost painful to keep my thoughts to myself.
When it would get out of control, the teacher would have me sit at the one desk in the class that was placed next to her desk. Since she was teaching at the front of the class, I had no one to speak with.
It was a good way for me to be out of my normal situation and learn to "just be quiet."
FYI, there was a lot going on at home. My parents did not really speak with me for any period of time. They were going through a lot in their marriage and at work.. And my sister needed a lot of attention all of the time.