Um I think that the fact that the QUESTION said it had to be a central idea kinda makes it self-explanatory. I guess they figure most people can work it out? Of course it doesn't specifically say it has to be a central idea, some years they don't say that and they just recycle the same rubric every year.I was quite put off by the stimulus for the creative. So I quickly checked the rubric and it didn't say that we will be marked on our ability to use the stimulus as a central idea. So i just sorta mentioned it in there a bit...screw having it as the central point lol