What did your English teacher give you as the background material for this module?
Anyway, here's my penny's worth:
Whatever board you're doing this with, try going to their web site and see if there are any teacher's notes or exemplary papers and even read up the past examiner's reports. This will give you a huge insight into what they are looking for and how to spec it out. Don't forget a bibliography and if you do look at the examiner's exam reports, see what they say about the over-researched area of children' language.