That book where little girl gets d by uncle..father doesnt take care of her and teacher steps in..?

I read a book for psychology cl where i had to diagnose the main character with a disorder from the DSM.. I forgot what it was called and I can't seem to think of the title.. all i know is that her father never took care of her. she had no clothes. she was very unsocial in school. her uncle d her later in the story. the teacher began to be very close with the child and was the only one who gave her a chance. the teacher like bought her a dress or something..