Mentoring

College professors sometimes help math lab tutors and they are available to students during their designated office hours.

As a student at CSU Hayward (now East Bay), I tutored students in Accounting which paid me a small stipend. When anyone has to teach students with different learning skills, you learn better skills in communication.
I did some studies for a business professor that involved investigating the cost of food in convalescent hospitals, because he was a member of the Board of Directors of a hospital. That was interesting and fun.