Sorry I've been quiet recently, I've been snowed under with mock marking (y11), report writing (y9) and general Christmas concerts/life. So busy in fact that you feel of my threads I'm on! 

Second, that sounds like a horrible situation to be in. Is there any career guidance available near you? It does sound like he needs someone impartial to help him think through his options. My friend's dd was in a similar situation a few years ago and ended up dropping out for a few months to decide what she really wanted to do, then managed to get herself onto an apprenticeship that she's really loving. I know your ds says he doesn't fancy that, but I'd he truly aware of what other options there are out there (I certainly wasn't at that age)?
We got dd's first report last week. It doesn't say much as it's not a full report yet, just targets, predictions based on what they can see so far, and attitude grades. Her targets are as I thought they would be, her predictions aren't quite there yet, but as a teacher is be surprised if they were at this stage, and her effort is very good. I'm happy with that, and so is she.
She's a little put out as her further maths teacher is currently on 2 weeks paternity leave, so that's 2 weeks of teaching that they're going to have to make up elsewhere. My suggestion of "you could have a look at those chapters yourselves" was met with disdain, as she already has, but nobody else will. I'm sure she'll survive, and it won't do her much harm in the long run (is not as if the teacher is just taking the piss)