Some HTML, Javascript, Jquery, D3.js and CoffeeScript magic - a bit like an html pivotviewer

I put this demo together last week for a school project -  http://slodge.com/teach/

It uses all sorts of html and js goodness inside and it's definitely at prototype stage - but I'm thinking about ways it could grow and change....

Ideally I'd quite like to get access to raw data from school SIMS databases. I will investigate further - but I am not paying GBP5000 for an SDK