Examine how the values and attitudes of non-conformity are explored in each prescribed text (Refer to context, purpose and techniques).
It's always a good idea to work from your teacher's instructions, as s/he has an idea of how it will be best for you to approach the work and, if you can show that you followed the recommended approach, that will help you if there is any question about grading.
So, for each text, ask yourself how values and attitudes of non-conformity are explored. For each text in turn, think about content -- the plot of the work. Then think about the author's purpose. Then think about the writing techniques used by the author. Jot down your any ideas that arise during these reflections, and you will find your thesis in your notes.