If selected for the ISR, he will be required to remove his name from the national HSSP board.
Typically, if offered the ISR they only give you a few days to accept it. It is not a you can hold onto it until you find out if the college accepts you. Most posts that I have read regarding ISR is it on the spot at the end of the interview. It is a rarity, because most units have 1 ISR to offer.
I have never heard of someone being told they were selected for an ISR prior to the interview. Not saying it doesn't happen, just saying most find out during the interview. Remember, most recruiters don't work with ROTC candidates a lot. Their job is to recruit enlisted members. It maybe that he is qualified, but not selected, however not knowing the system, they said he is selected. It maybe that the CoC stated to the recruiter, that if he appears in person as good as he looks on paper he will be offering the ISR to their unit to your DS.
~ IOWS, lots of maybes and mights without knowing more info.
My suggestions would be:
1. Have your DS call the CoC on Monday and ask if he could also meet with some POCs (junior and seniors).
~ If he already has a career field interest, ask if he can meet with some mids that are trying for the same field. Also see if there is a mid that has both his same intended major and career field aspirations. ROTC is a balance of both aspects.
~ This will allow him to also get a feel for the unit from a peer to peer aspect, instead of a CoC selling the school and unit.
~~ We did this with our DS. He actually played Xbox in the ROTC lounge with a couple of 300/400s and just yakked away for about an hour.
2. Have him think about the type of things he really will want to know somewhere later down the pike.
~ What is considered a strong cgpa at the school to get your number 1 career choice? How many statistically from this unit get their 1st choice assignment? How many statistically that enter as a freshman commission 4 years later?
3. If you are going to drive with him to the interview, than make plans to meet up with him somewhere on campus later on at a specific time...i.e. the student union, book store.. heck, the bench next to a statue on campus.
~ The reason why is two fold.
~~First, him entering alone illustrates this is about him and his future desires.
~~~ Not a biggie if you enter with him, but I would not recommend you to stay past a few minutes after the introductions. Staying can become more of a dog and pony show for the folks. Think campus tours.
~~ Secondly, meeting him somewhere else on campus will give him those few minutes to imagine next year there by himself, walking the campus like any other student. Kids walking around with the folks is a blaring sign that they are in HS doing the tour. Walking alone and they just look like another student attending the school. In a way they get to feel for a short time the reality of what is occurring in their life. It can shock their system and they now see and feel it.
Our DS went AFROTC scholarship and where he decided to attend was not even on his top 3 list. It jumped to number 1 when he sat down with cadets that were in his major and had pilot slots. He met up with Bullet at the food court and the 1st words out of his mouth was can we go to the bursars and pay the deposit?
~ AFROTC scholarships are not like NROTC. It is tied to the cadet, their major, but not the school. He could have taken it anywhere he was accepted.
FWIW, it was also Bullet's alma mater and where he commissioned out of decades earlier. Bullet did enter with DS, met the CoC and left within 5-10 minutes.
~ My avatar is Bullet commissioning our from the same detachment as DS 25 years to the date from when he pinned on his butter bars.
Hope my novella helps. Good luck.
PS: Our DS was like your DS. He decided that he didn't want an SA life. It was part being a military brat his entire life and wanting to be a "normal" kid with a "normal" college experience. The other part was he wanted non-tech/STEM and that is not an option for USAFA...his ROTC scholarship and merit = free ride.
He is now an O2 pilot in the AF...his goal when he interviewed as a HS senior.