Need some validity first. What class is this? Also, what's the test over if you were to take it? How long do you have to figure it out? Also going to need to know other important things. Do you happen to know the server, is it a ghosted image, what are the OSs is use? A challenge like this in a class room you are likely going to know defensive measures put in place as well. All that we are going to need to know. Do you have access to a share drive?
In the event you don't respond. My very first guesses would utilize some SEing. His interests he has discussed in class (like sports teams) or if he ever mentioned his kids, etc. Or has he left clues throughout the day for such a challenge.
"The quieter you become, the more you are able to hear..."
"Drink all the booze, hack all the things."