Jersey Jazzman is a music teachers who loves to dissect the latest claims with hard cold fact and reasoned analysis.
In this valuable post, he explains why pundits and policymakers shoud stop reporting test score increases as “X months” of growth.
Why?
Because it is nonsense.
Diane Ravitch's blog 
The Jersey Jazzman and Di Carlo are some of the best analyzers of the true reality I have seen. My best world if financial fraud and not in just schools but transportation and the criminal justice system. There is a reason that the Jazzman and Di Carlo are not very highly paid consultants to help fix our school systems based on real research and analysis and that is that all of those organizations are corrupt. As time goes on I am amazed at the totality of the corruption which is getting worse as they fight for their survival as those like the Jazzman and Di Carlo and others such as myself lay down the real facts of life and put it into the public. The one thing the thieves cannot stand is the “Light of the Truth.” Jazzman and Di Carlo please keep doing what you do. You are the best.
George,
Well said. I share you belief.