How do I unarchive a course?

Hello! I just started 10th grade with Acellus for the first time. When signing up and making my classes, I made the mistake of not adding Physical education class. I’ve been in Acellus for a month now and I just noticed that it says “Archived”. I don’t know how to unarchive it (my parent logged into the parent account and clicked manage account but physical education didn’t pop up and it didn’t have an option to unarchive it.)