Have you tried Lexile.com ? I too have a DD9 who is extremely unchallenged at school, esp. in language arts. What I do is find appropriate books on lexile.com (you can even search by award winning books, and various other categories). I go to the library and come home with a bag full of books every 2 weeks. She may not read them all, but having them around is my way of exposing her to the books that will challenge her. She also likes to read our adult National Geographic Magazine.