Chardy
So many of the posts are about what happened to our generation half a century ago, or to our children a quarter of a century ago. The OP is interested in her grandchild's future, not ancient history.
Yes, but a lot of posters don't read the threads on here or answer people's questions - we just get anecdotes about their own experiences
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A lot of people have expressed concern for children who are 'not academic', and suggested alternative routes for them. Would anyone who thinks they should be educated separately like to explain how they would decide whether or not a child is 'academic' at the age of 11?
Being good at puzzles in IQ tests is no guide, and general knowledge or ability to spell or do arithmetic just shows what they have been taught, so children from some backgrounds will do better than others. Testing writing ability is also likely to exclude children with dyslexia, for instance, as this is not reliably diagnosed before the age of 11.
A child with parents who are interested in education and have the resources to help them to learn will inevitably do better than one without. That is not always to do with social class, and it most definitely is not to do with intelligence.
Also, intelligence is not the same as academic ability. I have seen a lot of academic 'plodders' get PhD's and a lot of people without who are sharper of wit and faster of brain. An 'academic' approach is suited to postgraduate study, not GCSEs and A levels, which are largely about recollection and the ability to string a sentence together in a coherent manner, and is absolutely not something that an 11 year old is likely to demonstrate.
It is also the case that many, many people become 'academic' in later life, when they are more mature, have less going on in their lives and a better idea of where their interests lie, so basically selecting people for university study at the age of 11 is idiotic.
Some 11 year olds are a mass of hormones, and others are children. Deciding who will become 'academic' would need a crystal ball.