I'm surprised by all the posts saying that one would avoid disrupted classes by choosing private education.
I went to a private selective girls school at secondary level. There were some excellent teachers. However some teachers were not that great and were unable to control a group of 24 high spirited girls...
My brother went to a private boys school and they would also play around in certain teachers lessons.
My DS is in a two form entry state primary school with 28 children per class. Whenever I have had to pop in to drop something off I have always found the class working in an orderly fashion.
I think the main benefit of private schools is the smaller class sizes, and I think private schools focus more on ensuring each child reaches their full potential. I also have a DD in the nursery class of a prep school - when I go to events at her school the children come across as more confident, although some slightly are precocious.
I expect that the lessons at the private school are more interesting as the private school teachers are on the whole more experienced, have spent longer in the school and make the lessons more interesting by making more use of the outdoor space etc., and doing more imaginative acitivities with the children.
At my DS's state primary the school achieves high academic standards, the children appear happy but I suspect that the lessons are not as interesting in some cases as in a private school, and I suspect there is less time allocated to sport and music.
I sometimes look at my DS who is not that confident and wonder if he would do better academically in the private sector..however I don't feel that it would be worth spending £3600 per term for prep school fees at a school 20 mins drive away when he appears happy in his state school, and has local friends which I feel is important at primary age.
If there were a prep school on our doorstep I might be tempted to go back to work to pay the fees. There is no private prep school within a 6 mile radius of our house whereas there are several good state primaries and a good comp.