This is an adaptation of the Craig Barton's original Dotty Thinking Lesson (https://www.tes.com/teaching-resource/dotty-thinking-idea-for-teaching-statistics-6291113) , for full breakdown of how to use this resource see https://teachingmathsdw.blogspot.com/
This is a fantastic resource. The lesson idea is amazing, and I will definitely be using it next time I teach box plots. Have used Dotty Thinking before, but love this use. The excel file is also fantastic to create on the go box plots from students data.