Important observation on teaching no. 17
See the thing with "normal" jobs is, that if you pop round to your new neighbours for a glass of wine that turns into a couple of bottles and wake up feeling decidely second-hand, then you can spend the next morning - after you have turned up to work two hours late because of the "late running trains" - hiding at your desk clearing out your old mail until you feel able to face the world. In many jobs, just once in a while, you could actually have a little sleep at your desk and people would be polite enough not to mention it.
I have this feeling of doom, having dragged myself out of bed for an early lecture this morning, that hangovers and year 9 lowest set maths don't mix.