We are learning this structure in my school - What or who is being represented? What is the dominant stereotype for this person/group/etc? Does the representation challenge or reinforce this? Then choose a few key moments to back up your point of challenge or reinforcement.
With my paper, I structured it into four sections, Mis en scene, cam, sound and editing. I then picked out things from watching the extract which demonstrated how something was represented by these four things. :)