Editing and 'subbing'

'Remember this is Self publishing' says Kevin, our tutor, as he gives us another bit of homework, or a bigger piece of work for one of our four assessments. So this week we are doing our own editing and proof-reading, or to give it a new name to me, 'subbing'. Apparently I have missed my calling, as my gimlet eye picks up all the spelling mistakes in other people's work. Actually, I'm just a spelling Nazi. And as for misplaced apostrophes, don't get me started.... or maybe that should be ''''' ?
There are 10 of us on the course, and some interesting writing will come out of it, I think. My own work is getting a real once-over, and will be much the better for it.