Greetings!
While that's a very well-written introduction, I can see your teacher's point: it is very psychologically-oriented. Think about how what you have said relates to the characters in Jane Eyre and The Box Garden. What social conventions affected the impression Jane made on people? How did she cover her essential identity? Remember that modern psychology had not yet been invented when Bronte was writing, so her works were created without the benefit of our present understanding of "identity" and "self."
I haven't read Shields' work, so I can't be specific about that one, but I do think that if you keep these things in mind when writing, and try to work a mention of the main characters into your first or second sentence, you'll accomplish what you are trying to do, particularly in relating Jane Eyre's childhood experiences and social position to your premise.
I hope this helps!
Thanks,
Sarah, EssayForum.com
Sarah, EssayForum.com