I remember the book because I really liked it while I was in elementary school (19 now). But the premise was that the girl's family all had wings on their backs that they kept tucked tightly so they could operate like normal humans. However, as the story evolves, something changes and the girl slowly learns to use her wings to fly (which none of her family has done before).
The little girl was in either middle or high school. Please help because I really want to find this book again.
I'm about 45% certain the title even had "wings" in it.