Hardly anyone is pro-grammar schools these days, because there is no evidence that children progress better in them, or that they give a better chance in life to a child for going there.
The whole educational scene has changed drastically since the 1950s and 60s.
Back then the options were grammar schools for a small percentage of children , secondary moderns for the majority and private for the remainder.
The secondary moderns provided a very poor standard of secondary education and most were leaving school at 15 before there was even an opportunity to sit and o level.
Grammar schools selected their pupils, put everyone through o levels and tended to recruit better qualified teachers. So of course the outcomes were better for the grammar school pupils. Even so, over half of the girls in my grammar school left without going on to the 6th form.
Our of those who did do A levels, I think about half went to university.
Today nearly half of all children go to university. Comprehensive schools are incomparably better than the secondary moderns of 50-60 years ago - in terms of staffing, facilities and standard of teaching.
It makes no sense to bring back grammars now. It is a ludicrous policy that the PM has lighted on to appeal to voters over 60 who regret that they did not have a better education themselves. She is making herself look stupid and dogmatic in the eyes of the teaching profession and all the younger people who have had a good education without going to grammar schools.