A- A A+
 
A- A A+

'Value-added' estimates used to evaluate teachers are highly imprecise ...

„Some of the measures we now use to control schools have more error than others. One of the worst in this respect is the 'value-added' estimates used to evaluate teachers in many states. These are highly imprecise, and ratings of many teachers fluctuate dramatically, sometimes wildly, from year to year.“

Univ.-Prof. Dr. Daniel Koretz, „The Testing Charade. Pretending to Make Schools Better” (2017), S. 15f