I don't pick anyone up on spelling and grammar usually, but where someone makes a big thing of his/her superior intellect, I think it's relevant. Last night at a sixth form information evening, I saw 'advise' for 'advice' and 'student's' for 'students', which made me a bit dubious - but I bet if jabed had had those mistakes pointed out to him spotted the same, that would have been recruited into an argument about the poor quality of state education across the board. Which would be unfair and annoying!
Anyway.
I don't think many people go to Oxford or Cambridge with the intention of becoming a state school teacher - of course some do, but I'm not sure it's usually a common ambition.
What does happen, and I've seen it happen, and it was suggested to me as a potential Plan B whilst I was doing my PhD is that people finish Phds and are very well versed in whatever that area is, and obviously bright - and then find academia very hard to get into, and even harder to get any sort of permanent contract which is going to get them a mortgage and stability.
Then people start asking if they've thought about teaching in a school instead. And they don't always get accepted onto a PGCE because their subject might be over-subscribed, or there might be more convincing candidates, or the admissions people are suspicious that they are doing it as a plan B rather than out of a passion for teaching, and may just leave if something better comes along.
And then people start saying 'have you thought about teaching in a private school? You get nice long holidays, and you don't need to be qualified, and the kids are usually quite well-behaved.' And then some of them do that, and they may well end up being good teachers, or they may not.
Even when my career in academia was looking as though it would never go anywhere, I responded to such suggestions with a polite smile, but would never have taken that path - I do think that the pedagogy is important, and I know that it's taken me a long time even to be as good a teacher to undergrads as I am now, and I think there's still a lot to learn - but in academia as in private schools, you don't necessarily get much training in how to actually impart knowledge and make a class productive and engaging. I do alright, but I don't think I'm done with improving by a long chalk. I also know that whilst I know a lot about one area of my subject, I'm not particularly capable of making other areas of it interesting to 11 year olds, or getting 16 year olds through their GCSEs. I might do ok with a bunch of motivated children, but I wouldn't assume anything!
So yeah, I doubt there are all that many Oxford or Cambridge graduates at my daughters' schools, but as long as they are qualified and trained to do what they do, that's fine by me.