It's such a hard one isn't it? I really think that it depends a lot of the child but also on where you live.
I can see oddles of threads here saying that you could send your dc to a grammar school instead of private, church school instead etc...
The reality for some people is that there is no choice.
We have a few private around here.
No grammar school (the closest one is about 30 miles away)
Our 'good' state school still have 'low ish' results ie they are counting on the fingers of one hand the number of peopel who went to Oxbridge or an RG Uni. Actually 80% of students went to local Uni (None are RG).
Statisticall the chances of my dcs to then go to an RG Uni (which they are capable of, dc1 is expected a level 6 for the SATS in maths, SPAG and reading...)
So the choice for us is private school which we would REALLY struggle to afford or our local comp with so called good results (well they are compare to the ones around but not nationally if that makes sense).
I fully agree with CookieDoughKid. State school is geared to acheive 'average' results, not to excel.A few of the teachers that I have talked to agreed on that too. The system itself isn't geared towards acheiving excellence, nor is it to put high levels of expectations ionto the dcs.
Since my dcs have started primary, I have put a lot of effort into trying to teach them that having the right answer is enough. Prensation is essential. As is spelling *(out of the spelling test) and the ability to explain how you arrive to that result. At no point have they been taught that. None until Y6 when suddenly it is seen as actaully important but no one is there to teach them how to do it (nor do they give them the tools. Eg the papers for the SATS doesn't allow space for doing the working out nor are the children allowed a piece of paper to 'try it out' before writting the answer down).
On the other side, my schooling was only geared towards excellence (different country) and it shows. It shows in an ability to be efficient and straight to the point, to present an argument, to know the importance of a clear presentation. All the things that Cookie was been mentioning and are completely missing in the professional people I've worked with.
The issue for me is the following. I know I can (and in some have already) taugh some of these skills to my dcs. I have the chance to be able to do so. But is it enough?
Is the ability I have to try and widen their horizon enough for them to acheive what they want (and be the best in what they chose to do)? or do they need other inoput such as the one from a pruivate school?
It's just impossible to know in advance I think. You can only guess and I suppose that some times you will guess well and sometimes you will spend a lot of money for little gain at the end.