It is a really interesting idea, and one that i tried to create while studying for my A-levels. For me it personally flopped because i wasn't able to create enough imaginary ideas, and i already knew what i was going to get at each level. I guess in the classroom, depending on the ability and the attitude of the kids, you could introduce titles like squire, knight, black knight etc. until they get to choose their own title. It is certainly something that i would be interested in trying out at some point, but the key thing is time at the moment, maybe over the long summer holidays i might give it a bash, but until then i think i will have to leave it!