Everyone understands that the key fact about Néw York’s test scores is that they will be used to measure the “effectiveness” of teachers. The progress of children has been small over three years, and the scores align closely with demography, language, disability, and family income. Ho-hum.

Mercedes Schneider reminds us of basic facts:

“Under no conditions is it a valid use of student test scores to evaluate teachers or schools.

“The students are the test takers; these tests purportedly measure their achievement. There is no way to account for all of the possible variables that would enable the New York State Education Department (NYSED) to accurately evaluate teachers and schools using student test scores.”