Since we don't have any prior knowledge about this 'new dimensions common core story', we can't say for sure who the creator is. It could be someone within the educational field who had a unique idea to combine the concept of new dimensions with the common core and turn it into a story. It might also be a student project that got more attention than expected. There are so many possibilities, but without further information, we just can't know.
Since there is not much information given, it's difficult to say precisely. However, if we break it down, 'new dimensions' gives the idea of something new, different, or perhaps an expansion. 'Common core' often refers to a set of educational standards in the US. So, 'new dimensions common core story' could potentially be a story that shows how the common core educational standards are evolving or being applied in new and innovative ways. It could be about students or educators finding new ways to meet the requirements, or it could be a fictional story set in a world where the common core has taken on new forms and challenges.