I subbed today for a middle and high school band teacher.
The woman had a student teacher. I've subbed in rooms with student teachers before, but this time she was really good and on the ball. She ran all the classes, and I just sat to the side and collected the paycheck for being the "certified teacher in the room." I feel bad for her. I didn't need to be there, and she should have been able to get paid for subbing for her own Master Teacher.