From the NY Post:
No stranger to making education reforms, Mayor Bloomberg outlined a plan today to do away with lifetime positions and replace it with a system where teachers would be required to earn tenure.
In an effort to focus on teacher quality and effectiveness, the city will implement a four-tier rating system for determining whether a teacher should be awarded the tenure protections that come with the job.
Starting this year, only teachers rated “effective” or “highly effective” will be eligible for tenure, Bloomberg said, transforming a system from one in which tenure is taken for granted to one in which it must be earned.
In the announcement, city officials said tenure may be awarded in the third year -- or any time thereafter -- always contingent on whether a teacher has made a significant impact on student achievement.