'to say that that state system is failing is not a direct attack upon you or your husband as teachers, it is a comment on the government.'
The system isn't failing. The system has weaknesses. The majority of schools and teachers in the state system do their best to help their students achieve their potential. Unfortunately, however good a school and its teachers, this can't always lead to good results for all students.
'State school systems fail, in my opinion, when parents are prepared to go to a lot of trouble, including paying money, to send their children to other schools in preference to state schools.'
Exactly - there's a link. League tables and more 'choice' (which means more choice for the most privileged and less for the least) has led to struggling schools being abandoned by those who can do this while we all know the games being played by those who want to get into the over-subscribed (soaring property prices, adopt a faith, interviewing etc)
'In France, where I live, for many years private schools were only for those who weren't able to keep up in the excellent state system. That is unfortunately no longer the case.'
Again, exactly, in countries where there is little support for private schools and no faith schools the state schools offer a more equal education. Countries like Switzerland and the Scandinavian countries don't have the horrible conflict and deceit to fight for the best schools and surprise, surprise they have greater social mobility than in this country.
'I don't think private schools reinforce class divisions any more or less than other systems.'
No more than what other systems? Schools which select and charge fees are of course not open to those from every class. This increases social division. I can afford the fees, my neighbour can't.
'I don't agree that there isn't lots of experimentation in private schools. My experience is that they offer far more than state schools, as they should.'
This is a matter of opinion and varies from school to school. Most private schools pride themselves on their traditional approach. I know 4 or 6 private schools pretty well and they offer a traditional syllabus, with traditional uniform, traditional discipline, traditional teaching styles. Experimentation is not the word you would associate with most private schools but maybe you're thinking of that famous one which doesn't have a curriculum as such?
'I quite agree that selective private schools have an advantage when it comes to being the best. That doesn't negate the fact that they are and create a positive benchmark.'
For who? How does this help state schools and the kids who come out of them? This thread started off by pointing out that the majority of Oxbridge graduates come from private schools. State school kids often find it very hard to compete with private school kids for all kinds of reasons even though they may well be their intellectual rivals. As private school kids are segregated from state school kids they cannot provide a direct role model, intellectual challenge or whatever.
'I went to a grammar school between 1977 and 1979. It was full of working class children.'
What do you mean by 'full'? Which one was it? The majority of grammar school kids were and continue to be middle-class and relatively privileged. Fact. Grammar schools comprised less than half of all schools. Fact.