From The Wall Street Journal:
New York City has been cleared to release performance reports for thousands of teachers after a state court on Tuesday declined to hear a final appeal from the city’s teachers union to keep the information private.
The reports, which rate teachers against their peers, were created in 2008 under former Chancellor Joel Klein as part of a push to evaluate educators using student test scores. They use a complex formula to try to isolate each individual teacher’s effect on their students’ performance, adjusting for factors such as poverty, class size and absenteeism.