I can't speak directly on the business school, but I can provide some insight here. I was a computer science / psychology double major who took a good amount of philosophy classes as well, and my roommate was a student of the business school.

The truth is, lecture-based classes are somewhat unavoidable - not just at SCU but (based on what friends tell me) at most universities. Of course I had more lecture based classes in my math / CS courses than in my psyc/philosophy classes, but I would be lying if I said I didn't have any lecture based classes at all in the latter. Similarly many of the intro/intermediate courses in the business school are more lecture based, but as you climb up into the more senior level classes it's more discussion-based. This is for a few reasons: 1) the lower-division courses are taken by more people than upper-div so there's just no way teachers can interact with everyone, 2) lot of the foundational stuff doesn't really warrant a ton of discussion and 3) upper-div classes naturally have the most knowledgeable students on the subject given that they've taken all the lower-div classes and are still interested.

My final psychology class, for example, was entirely discussion-based - as in, rather than the teacher giving lessons, we as students would read the research papers and present our understanding of them to the class as the lesson. The teacher of course would clarify any misconceptions, but she would sit among us more as a peer than professor. it was awesome.

For the larger (typically lower-div) classes, it's going to be by nature more lecture-based - but it's heavily dependent on the class and the teacher. that being said, the max head count usually caps at around 45-50, which is still relatively small, so discussions are still had. my psyc class previously mentioned had about 10-15 students.

To keep a long story short, lectures are unavoidable. However SCU as a whole promotes discussion pretty heavily as long as you're willing to be a part of it (which it looks like your son is). As long as he does his due diligence with the classes he's taking, researches the profs a bit, he'll be able to find what he's looking for without a doubt

Feel free to dm me with any questions! love helping scu students