Orioles, welcome to HSBBW!
If you haven't already noticed, this is BY FAR the most informative sight online in regards to advise about what to do, what to say, when to do it, how often, etc.
You need not go any further for advise than the website you are currently on.
Take a look at this page that I pulled off for you to peruse. It will help you and/or son with tons of answers.
http://hsbaseballweb.com/players_parents.htm