For decades, teachers, managers and parents have assumed that the performance of students and employees fits what's known as the bell curve — in most activities, we expect a few people to be ...

A bell curve is a symmetric curve centered around the mean, or average, of all the data points being measured. The width of a bell curve is determined by the standard deviation—68% of the data ...

“Teachers rated ineffective on student performance based on objective assessments must be rated ineffective overall,” a press release from the New York State Education Department says. “Teachers who ...

Print; Email Facebook LinkedIn Twitter Copy URL. ... The alternative to standards is the bell curve, in which teachers have for decades compared student performance not to an objective standard, ...

At the top and bottom of the bell curve it was a different story. Among low-performing students, teachers consistently rated their black, Asian, and nonwhite Latino students more positively than ...