The show began broadcasting in January 2006, but was not picked up for a second season due to unsatisfactory ratings.

As it stands, principals are asked to give teachers who work for them one of two ratings: satisfactory or unsatisfactory.

The bureau said 118 of the 421 were not resolved to the customer's satisfaction, contributing to what it calls an unsatisfactory rating.

If a company fails to respond to multiple complaints, the bureau gives it an unsatisfactory rating.

Under the teachers' union contract, an unsatisfactory rating is the first step toward dismissing a teacher.

The Department of Education said all 45 principals had received, or were likely to receive, unsatisfactory ratings this year.

Ms. Lehrman received an "unsatisfactory" rating for the first time in her career.

This act would also allow a school to fire teachers after two unsatisfactory ratings.

In 33 years, she never had an unsatisfactory rating.

She gave two unsatisfactory ratings, only to find that the system protects teachers fiercely.