There is not at the moment a great deal of advice about how to handle graphic novels in the study of Part 1 of the Literature program and how to write about them. Your teachers will have some advice, but you may find the following TED talk at Dartmouth helpful.
http://www.youtube.com/watch?v=qAyEbgSPi9
Michael Chaney also mentions one of the most helpful guides to “comics” (which is really what “graphic novels” are, at root): Scott McCloud’s Understanding Comics: The Invisible Art. If there is not a copy available in your classroom, you may want to encourage your teacher to get one. You will find it very helpful in learning the lingo of the form.