More literate and numerate kids got selected for grammar school, that was the point. Pointing out that those who leave grammar school have high literacy and nu

More literate and numerate kids got selected for grammar school, that was the point. Pointing out that those who leave grammar school have high literacy and numeracy hardly demonstrates that it is a good way of teaching, when the intake for grammar schools is those with high levels of numeracy and literacy already. If you want to look at a true education revolution look to Finland, which is about as far from the grammar school systems as you can get, but also has an astoundingly high level of educational excellence.