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 analyzes reviews to verify trustworthiness.
I work at a school and am reading this book as part of a parent book club. The club meets once a week and we read sections together. We have homework and discuss using a variety of strategies. My participation rate increased from about 12 parents to 35.