What did the title have to do with the book?
The butterflies were a sign of hope. The barbed wire of course referred to the pain the girls were going through.
What would the main character be likely to do if s/he visited out classroom? I think she would bring everyone to tears with her story.
What lesson did you learn from the story? Never give up, no matter how bad the situation seems. There's always hope.
Disclosure - I received a free copy of the book which did not affect my honest opinion.