In 2010, the Los Angeles commissioned a rating system based on test scores and published the individual names of teachers and their ratings. New York City did the same last year. To say this was controversial is putting it mildly.

Many researchers opposed it, as did Wendy Kopp and Bill Gates. If the purpose of the ratings is to help teachers improve, how exactly does it help to publish those ratings? Shouldn’t they be part of a discussion between principals and teachers? Right after the ratings went public in Los Angeles, a fifth grade teacher committed suicide. His name was Rigoberto Ruelas. Collateral damage, you might say.

John Ewing, the head of Math for America, called this thuggish use of data “mathematical intimidation,” and said that mathematicians have an obligation to speak out against it.

Nonetheless, both candidates for mayor in Los Angeles say they approve the practice.

Is there any evidence that the public releases in either L.A. or NYC improved teaching?

Please, someone, get some informed advisors for these candidates.