@LOUKYDAD My 2 cents. It is great if he can do some advanced course. But priority wise it should be secondary, Top priority is to have a well balanced profile. Though this forum has repeatably posted a well balanced application should have great
GPA
MCAT Score
Shadowing
Clinical volunteer
Non-Clinical volunteer
Research
etc
it was interesting to note still some students for varied reason not having a balanced profile.
For example, noticed this year a student who has 524 but has 0 hours shadowing. That is not helping.
So first make sure he has time and have a balanced profile. If that is taken care, do advanced courses as long as it is not going to pull his GPA. GL.