He can ask things like:
"What ratio of freshman go on to graduate from this university?"I just finished reading a book where this is a great question to ask. It can let you know in a subtle way how many students can afford the college after their freshman year. According to this book, many colleges will offer their freshmas great financial deals ... but not at the student continues in the school, hence, many have to transfer.
"What percentage of freshman live in the dorms?"
"Does this university have 'community' options for students who choose to live on campus? For example, all of the business majors live in the same building and often will be enrolled in the same introductory classes so that they will have a sense of belonging to a community, which then decreases the odds that they will drop out."
"Do the professors in <field of choice> have many Graduate Assistants or Teaching Assistants grading their exams, or do they prefer to grade them personally?"
"I am pretty certain I want to major in <field>, but if I do change my mind, how difficult is it to change from one field to another?"
"Does the university have a job placement person who can help me with finding summer internships in my field?"
"Can you tell me about your work-study program?"
Hope this helps and I wish you son the best in his continuing education goals!
-Dorothy (LadyZolt)