I have often argued about (state-funded) faith schools in the UK, and whether their above-average exam results are used in repeated examples of the correlation fallacy.

Well, it seems they are.

The reality (and having worked in some, I should know) is that the sorts of parents who want their children to do well have high aspirations. Let’s call them HAPs (High Aspiration Parents). HAPs will do things for their children to further their education, both in and pout of school. HAPs will support their children by teaching them to read early, by setting high standards and expectations for their children and so on.