How do I know when to select courses for future semesters, do I get something in the mail?

Dates for Course Selection and Add Periods are available in Section III--Schedule of Dates of the current Undergraduate Calendar. Information about the Course Selection Period and specific Course Selection Windows is emailed to students. It is also available on the Registrarial Services website at https://www.uoguelph.ca/registrar/courseselectionwindow.