<p>Cool! A little jazz lover!</p>
<p>I don’t know trumpet at all, but I would encourage you to find a fabulous high school or college musician to teach your son, at this time. My own son has been incredibly influential to a bunch of little boys, and has loved teaching and sharing his love of jazz with them.</p>
<p>Being in Westchester, I am positive that you would have all kinds of choices. I would call your high school first, since sometimes the jazz/music department will have a list of very strong players who are willing/able to teach young students.</p>