From Sunday’s New York Times:

More than 200 teachers and principals received erroneous scores from New York State on a contentious measurement that ties their performance to how well their students do on tests, according to state documents obtained by The New York Times:

The error, which affected a small percentage of scores for the 2014-15 academic year, could be another blow to the practice of linking educator performance to student exams, a system that has come under fire in recent years…

Read the full article.