Class-Shopping. Pen and ink. Originally published in the Daily Pennsylvanian on September 6, 2007. Choosing classes felt a lot like shopping — students were presented with endless options (leafing through the course catalogue at the beginning of each semester was fun), inventory for each option was limited (slots filled up quickly!), and there was a pretty fair return policy (during the add-drop window, you could “try” classes out and then drop them without consequences, i.e.