It was just over a year ago that I left my job teaching in a north London secondary school to go back to university and take a Masters in journalism. On the face of it, it made little to no real sense. The place was full of lovely colleagues who were committed and talented and hard working. It had a good pension, I was on the leadership team so the pay was at least not totally derisory, and everybody knows that teachers' holidays are fairly good. People sometimes ask if I ha