Considering Panorama has done research on HT, I'm sure you are aware that members and especially people higher up in the organisation tend to a tad bit more educated and speak rather like a middle class indigenous white individual.

BBC: Panorama: Mondays at 2030 BST on BBC One

The service is free and professors or students can set up a page for an individual class.

FORBES: Move up http://i.forbesimg.com t Move down

As more and more people answer a question it becomes like a Wikipedia for the individual class, Sankar says.

FORBES: Piazza's Q-And-A Website Goes Back To School