Last summer I added Mo Willems' The Pigeon HAS to Go to School! to my classroom library. Of course, this addition was a no-brainer. Willems' books are always super popular, especially Pigeon books. Just as predicted, my students loved this book. It is the perfect length for the beginning of the year, when attention spans are extra short and students need a little break from all the procedural training they are receiving. Since I knew this book would be a hit, I decided to make it the…