Teaching with XP
9gag user and teacher huaojozu has special way of teaching courses. In the courses you can earn XP, which you can spend on class abilities. Huaojuzu’s students can choose from three classes: The Quirky Mage (below), The Royal Successor and The Lone Wolf. I personally think it is a cool way to teach.
Update 2013-12-03:I received quite a few emails asking if I could provide a mirror for the other two classes, since 9gag removed the original posts. Unfortunately, I did not save a copy of the other classes, but with a little help of archive.org and a Twitter search, I was able retrieve the other two classes.