Definitely ask to meet with the department head (sometimes they are busy so another professor will take his/her place). You will get the most current information that way. For example, we just visited a college and met with a professor – it turns out they are reworking the degree plan for this fall which isn’t published yet, but he gave us a copy.
Have a small list of questions ready to ask if needed. The kids can get a little nervous meeting in a professor’s office, so having a list ready helps them feel prepared and you’re less likely to forget something.
Also, ask to have lunch with current students in the same major/areas of interest. While this sounds like a minor thing, it is actually where we got some of the best information! The kids are honest about classes, professors, housing, etc. and will give your student great inside tips!