To calculate the overall star rating and percentage breakdown by star, we do not use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
I have been an AP Language teacher for 4 years and this book is UNDERWHELMING. I bought it in hopes of supplementing what I already teach in my class and I was very disappointed. The tips and pointers are appropriate for Pre-AP students, not juniors in high school already enrolled in AP Language. The multiple choice is mostly in line with AP Classroom and other Collegeboard released multiple choice exams. I will probably only use the multiple choice practice exams. The free response questions are a joke. They will not prepare students for real AP exam Free Response prompts. If you are homeschooled, this is a good guide, but I am not confident that this Barron's content specific book will help you get a 4 or 5 on the AP exam if you are ONLY using this book as test prep.