What School Grades Measure Best: Family Income

12 Feb

Diane Ravitch's blog

A reader forwarded this excellent article that appeared in the Denver Post.

The author Robert Zubrin scanned the state’s tables ranking schools based in large part on test scores. And this was his amazing discovery:

“So, does this testing data, acquired at great expense in both money and class time, tell us which schools are doing their job and which are performing poorly? Not at all. Rather, what really jumps out of the data is the extremely strong relationship between school rank and student family income. This correlation is so strong that it is possible to predict the rank of the school in advance with fair accuracy just by using a simple formula that multiples its percentage of low-income students by 4 and subtracts 20….

“In short, what we have managed to learn is that the children of doctors and lawyers do better on standardized tests than the children of…

View original post 123 more words


Posted by on February 12, 2014 in Uncategorized


2 responses to “What School Grades Measure Best: Family Income

  1. Clifford

    June 29, 2014 at 21:54

    Makes sense. So why are teachers being crucified for something they can’t change?

    • Lloyd Lofthouse

      June 30, 2014 at 07:18

      wrong headed thinking
      an addiction to power


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