I am the parent of a couple of "not so stellar students". One who's sort of similar to the author's son. He really struggles academically, doesn't like school, probably won't be "successful" as the world expects, but I think he's going to make it one his own and do ok. The other... well, we have bigger worries about him. But... I think endings like hers are meant to encourage and tell parents there is hope. No, not every story turns out well. Some kids remain just barely getting by, and some kids just tank. But as parents...we have to have hope in our kids. Always. We can't give up on them. And stories like that do give me hope. Hope that kids can turn it around and end up all right.