Instruct: Classify the given review as either positive or negative.
Query: Okay for teachers but not that great for students.

I have used this book for a year and have come to the conclusion that I need a different book.While the book does a good job at explanations, its layout is bad. If you want to look up a particular reference you will have to dig for it, even if you were just looking at it. I think this book would be better if the author considered making two books. One a work book, and the other a reference book. This way finding what your looking for would be easier and less frustrating.