cringe

This is the first time I will see this class and I pump myself up to be strict and look mean. I don't want to be a push over from the first day. I walk the corridor to the classroom and try to avoid smiling at the kids as I unlock and enter. The students walk in and after greeting them I allow them to sit. It's then that I notice their teacher standing at the door and in confusion I try to argue that this is my class. This is however not my class, I am in the wrong classroom, I have misread the timetable and have to gather all my pride that is seeping into the carpet to walk out of the classroom and find my own class. By this time I have lost all confidence and the first day of term has begun.