mollie65 Whether they were your words or not, you chose to use them and, as you acknowledge, they reflect the received wisdom of that time - as, no doubt, does the phrase "weed out" (Definition: remove unwanted elements).
You have not, I notice, said whether you believe that designating children "no-hopers" at the age of 11 did not adversely affect their life chances.
To decide at the age of 11 that the vast majority of children are unlikely to be capable of succeeding academically is, I feel, presumptuous and ill advised.
The fact that grammar school girls were also subject to a more narrow curriculum than boys I think demonstrates an approach to education that favoured the maintaining of what was perceived to be the "natural order of things" - male, upper class dominance. I feel that, even if the bias against girls is unlikely to be so overt now, the introduction of more grammar school places, reflects this hierarchical mindset and will further entrench inequality.