The New Teacher Project has released findings, Leap Year, from their program for assessing first-year teachers. The TNTP report provides some great information that can certainly help school districts work with first-year teachers.
I found one statement especially exciting.
Multiple measures tend to point to the same conclusion about a teacher’s potential. Teachers who do well on one ACE measure earn generally high scores overall.
If you look at value-added data, i.e. test score data, as I do, it’s important to know that such data matches up reasonably well with more subjective measures. So the claim is great news…except it ain’t true.
If you read the whole report you find the actual correlations between different measures.
The fact is that none of the measures is very highly correlated with any of the others. And note that the value-added measures have particularly low correlations.
I’m not saying there’s anything wrong with TNTP’s overall evaluation method. But please don’t tell us that different measures all tell us the same thing when your own calculations show the opposite.