hi, Have you considered showing how intervention strategies help children who struggle with literacy, especially reading and writing. Which ever you choose you need to make sure that you can refine the content to one area (literacy is a huge topic). The best way forward is to have an idea of what it is you want to find out and how this is going to benefit anyone who may wish to read it. How much has been covered by other people? How can you validate what you have found out? Is there enough research been done for you to be able to refer to?
These are some of the questions you need to think about before you get too bogged down with a topic area that you can't rein in.
Portchesterqueen