We have been saying it for months, no, since 2009, when Race to the Top started.

Value-added assessment or value-added-modeling is not ready for prime time.

Now we have a technical paper by American Institutes for Research that says it:

VAM is not ready for prime time.

Here is the takeaway:

“We cannot at this time encourage anyone to

use VAM in a high stakes endeavor. If one

has to use VAM, then we suggest a two-step

process to initially use statistical models to

identify outliers (e.g., low-performing

teachers) and then to verify these results

with additional data. Using independent

information that can confirm or disconfirm

is helpful in many contexts. The value of

this use of evaluative change results could be

explored in further research efforts….”

Is anyone at the U.S. Department of Education listening?