Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Highly useful book!

As a professor myself, I highly recommend this book to anyone who teaches college students. While it doesn't offer easy answers or a fool-proof formula, it poses many helpful questions that have made me reconsider my strategies in front of the classroom- and so far to good effect. The fact that this book is based on real-life research makes it more than just a how-to book. It also makes me think about how completely unprepared my education made me to stand in front of students every day...