Colleges make campus visits to high schools and talk to the juniors and seniors about admission practices. If he continues like he has been for the rest of this year and his sophomore year, it sounds to us like he is on the right track.
Make sure he signs up to visit with the recruiters of the various schools when they visit his particular campus. Specific questions can be addressed by them at that time. If he doesn’t feel comfortable asking in front of other students (which, honestly, they probably have the same questions and feelings), then you can always call the admissions office at any of the universities and perhaps set up an in-person meeting.
Please send questions to firstname.lastname@example.org.