anonymous tipline for schools

http://www.schooltipline.com/en/ is the place. the whole idea of the website is sort of silly as it seems very easy to abuse, but that's not what this is about. this is about their home page.

what is that pie chart all about? first of all, i can't find anything on the page to explain what the point of it is, but besides that, the green and red sections don't even have labels.

what, what?