To calculate the overall star rating and percentage breakdown by star, we don’t 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 purchased this for my granddaughter who was studying this book in grade 9 English. She found it to be a very useful tool that helped her learn how to interpret the concepts in the novel. She completed this course with a 90+% average.