For the OP, have your Son practice his metal arithmetic, its a handy skill to have when trying to work out time distance calculations at speed at low level. It will show a determination to succeed. Your Son is still young, so a bit more maturity will help. Maths, english and communication skill are a necessity, as is the ability to listen and learn from those more experienced than yourself.
I do have a bit of experience in the area, having survived 22 yrs in the RAAF, and have been working with the Student Pilots for the last 24 yrs.
Yakami , you need to listen to those who have been there and done that, or you wont last in the system.