Don't count on the school to be proactive, by the way. They will likely be reactive and wait for the situation to get bad before response. And that response will probably not be, "Your kid is acting up... he must need a bigger challenge and grade acceleration." It will probably be, "Your kid is acting up... he must not be mature enough to accelerate a grade."
This is exactly what happened (in addition to many other things) to our DS in 1st grade. It took half a year to even get them to let him use the 2nd grade math workbook on his own, to basically teach himself. He's accelerated two full years in that subject now, btw.
