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.
A good sourcebook for schools who are wanting to take education outdoors that will get the children fired up. Juliet Robertson also uses tried and tested ideas from some of the outdoor greats e.g Joseph Cornwall, Thom Henley et al. A book that is very easy to dip in and out of.