Wow, I'd have to classify this volume as grossly (and shockingly) disappointing. The first issue is OK. It somewhat clumsily crosses over with the Robin War arc, but it's mostly understandable and it even offers some interesting setup of a new student with a secret and a promise of danger in the future.
But then, I don't even know what the heck happened to the comic. It becomes a short story anthology by a number of different authors and artists. It's not consistent and it's not particularly interesting. Meanwhile, it totally kills the flow of the comic's actual plot. A couple of issues in to this horrible "Yearbook" arc, I just gave up and skimmed through until it ended, and that's something that I almost never do with a comic, let alone one I paid for.
There is an Annual at the end of the volume, and it's really quite clever, but it's way too late. And that's the end of the comic unless the much delayed Rebirth ever comes about.
It's not just a disappointing volume of Gotham Academy, it's the horribly disappointing end, in which nothing of note happens. Wow.