I like that I do not have to prepare Grammar lessons with this book. If I see an area where my son is struggling, then I have additional grammar books to help teach or reinforce a concept. We are working on writing skills, so it's good to have my son work on proper punctuation and sentence structure on a daily basis.
I was disappoint with this purchase as I also purchased the student book. I did not realize that the teacher book had the lessons and the teacher answers separate so that I would only need the one book. Just something to think about in the future if you have only one student.