They would occasionally let us pick the books we wanted to read in elementary school, and we were sometimes allowed to read whatever books we wanted in middle school just to kill time, but otherwise, they pretty much never did this. Once in middle school, they said basically: "You can pick this book, this book, or this book. Which do you want to read? Get into groups of 3-5 people who are reading the same book." Otherwise, at most, they would say, "You don't have to read this book, but you'll get extra credit if you do."