Was really easy to game though. Our school library had a selection of books for what I can only assume were for special needs kids, really really simple books very few words with even fewer pages. These books rewarded an appropriate amount of points however so you got less, but you could easily bang out 20 of those books in one class and get a lot more points than you'd be rewarded for reading a real book.
A few of us would just go over grab a bunch of those books and read through them in like 2 minutes and complete the quiz.
They ended up not letting those books get used for AR