Washington Post Answer Sheet: The ed report that all 'reformers' should read

The ed report that all 'reformers' should read: "Here are two take-away messages for school reformers around the country that are embedded in an important new report about how the D.C. public school system is faring under the 2007 law that gave the mayor control. * The standardized test scores that have been trumpeted to show improvement in the schools cannot legitimately be used to show progress in student learning. This is true, the report says, not only for D.C. schools but for any and all other school systems that use standardized tests as a measure of achievement."