I'd like to add a little something to this, if I may. In the books, Dumbledore stated that, when he was looking for a Divination teacher, he was entertaining the possibility of dropping the subject altogether. Wouldn't this mean that the Headmaster and/or the board of governors have the power to decide which classes Hogwarts should offer? If so, and I certainly think so because it makes sense, then this is an interesting point. Perhaps we could actually come up with different classes taught by different professors altogether?

I haven't really thought this through, and I know it would be rather uncanonlike because we don't KNOW any other classes, but it's a cool idea to think about. Personally, I've always wondered what the complete list of subjects taught in magical schools is. I mean, Charms, Transfiguration, Herboloy, etc. - these are the core ones, and I'm not talking about those. I mean CoMC, Divination... the things that are offered once you go into the third year. I have only just received my Pottermore email so I don't know what the site says, but I REALLY hope JK sheds some light on this.

I dunno, just my two cents. Luke's (it is Luke right? Starbreeze) post reminded me of it. Perhaps we don't have to do this ALL the time, but as a school plot for a year, it could be really cool.