Either a lot of people are hung up on some definition of "Instructor" that doesn't exist, or they haven't read your posts. As I pointed out before, your son can already fly RC, and your plan is for him to help by doing the take offs (probably landings too), giving advice, and my guess is if you get in big trouble he'll be there to hand the transmitter to. In my book, that's an instructor.

There's no state or local licensing board to become an official "RC Instructor", so anyone that can fly and decides to help someone else learn is an instructor whether they call themself that or not. Some clubs have rules about who can instruct, but lots of people fly at unsanctioned sites and teach their friends and family. At my club we have official instructors who use buddy boxes, but I've also seen a bunch of people (frequently a father teaching his) doing exactly what you are doing, passing the transmitter back and forth.

So again, I don't see why people are going on and on about how much better it is to have an instructor when you already have one. Good luck, I'm sure you'll do fine. Keep it high so you have time to pass the transmitter back to your "instructor".