Making Productivity While Waiting

I arrived early in work so I have to wait 1 hour to begin my class. While waiting I did this random drawing that I later took it seriously. After the class, I have to wait another 1 hour for my mum to finish her work since we have to go home together every Thursday. So I finished this to make my 2 hours of waiting productive and tried to do different styles of shading like the spiral one, the cross-hatch, the one that is usually for the hair and the normal one. Well, my hands end up dirty as usual :/

            That is not me, by the way. My hair isn't straight, it's messy. O_o