You will be judged on the amount of coal and ore you can dig up per day. This stat can be seen on the mining tab of the City Specialization menu. Submit your screenshot/video of this screen along with your entry.
Which one of you rose to the top, pushing the boundaries of research for good? Who amongst the crowd enlightened their citizens and gave them all the worldly things they desired? You let us know in our Build the Best: The Academy city contest.