As a student, you have a lot of options for communicating with your professor. However, the easiest and quickest is the email. The important thing here is remember to write professionally. Your professor can be a mentor and guide through your career. Communicating with your professor builds this relationship and can be further practice for communicating with our employers.
Corrigan, Paul T. and Cameron Hunt McNabb. (2015). “Re: Your Recent Email to Your Professor.” https://www.insidehighered.com/views/2015/04/16/advice-students-so-they-dont-sound-silly-emails-essay
“Email Etiquette.” https://www.math.uh.edu/~tomforde/Email-Etiquette.html
Wood, Wini. “How to Email a Professor.” (2008). Wellesley College. http://web.wellesley.edu/SocialComputing/Netiquette/netiquetteprofessor.html
“How to Email a Research Professor.” University of California, Santa Cruz. https://ugr.ue.ucsc.edu/email