I was told to use a lookup table for the current situation. A couple signs up together for an online course, which is one of the radio button options (i.e. Individual, Couple).
I am assuming that it means to have a table called couples or something similar and when I create the accounts for the two they are added to the normal students table as well as the couple table. That way I can run a query on the couple table when I need to find out if a person signed up for a course as an individual or as part of a couple.
Is this the basic idea of a lookup table? I tried some google searches but it really didnt give me any great information on it.