Thank you Cams 33 and Inspiring Learning for your feedback. As an expat unfamiliar with the British system, we chose the private KG sector for our son. Our priority was to place our child in a small class and a school with an anti-bullying environment that intensifies during adolescence with social networks. Over the years, being a rather attentive parent, I've noticed that teachers in academic subjects in the private sector are not qualified. There's also a high turnover, and a music teacher one day can become a history or mathematics teacher the next, which raises concerns.
Regarding the children, there are expat children whose parents made the same choice for similar reasons, and then there are English children from privileged families whom I've discovered over the years to be arrogant, capricious, overly confident, disrespectful, and completely ignorant of what's happening in the world, often being mean-spirited despite courses on kindness, etc.
Today, my choice is wavering between a state school for Year 7 with tutoring to achieve good GCSE results and Heritage, which I find transparent, academic, with small classes (and no cafeteria). It is certain that from the sixth form, we will opt for a state school, but it is daunting to put him in a class of 30 now. Being naturally discreet and reserved, I fear that he might get overwhelmed. Choosing a good private school to help him mature could also be a good option. The decision is truly very difficult, but your opinions really make me reflect. Many Thanks !