When I was young, my parents would hide the Easter baskets on Easter morning and leave a series of notes, each one leading to the next one, that would finally bring us to the candy. I figure it’s a similar situation here. It makes sense if her class is a scavenger hunt course, or maybe some kind of strange cartography workshop where you use your maps to get around campus.
your parents!?! your parents left the notes!?! as i recall, those notes were clearly signed by the easter bunny!