Nobody has a good word to say about school decile ratings even when they are properly understood. They are not rating the quality of the education the school provides, they are rating the wealth of its community for the purpose of compensating "poorer" schools with more public funding.
Schools in the lower deciles do not like the system because it unfairly stigmatises them, while higher decile schools say they dislike asking parents and sponsors for funds they think the state should provide. When deciles are reviewed on Census data, schools in areas of rising incomes tend to worry about losing some of their public grant rather than celebrating their good fortune.
But there is no doubt who is really worse off. As our reports this week have found, lower decile schools are steadily losing pupils to schools in better-off areas as parents seek the best for their children. Though often called "white flight", it is not simply a racial or cultural response.
If it were, there would still be a natural balance of ability in the lower decile schools. But educationists say "brown flight" also occurs to a lesser extent. Educationally motivated parents of any ethnicity are sending their children to a higher decile school.
Nobody can blame them. They do not buy the notion that the quality of a school has nothing to do with the wealth of its community. They hear educationists and social scientists talking all the time about low-decile schools being "disadvantaged" and draw the obvious conclusions.