Opinion: Experts weigh in on assessing teacher's value
from The New York Times
With students everywhere being tested annually for academic progress, it may not be a surprise that the data would eventually be used to evaluate the effectiveness of their teachers. Michelle A. Rhee, the schools chancellor in Washington, fired about 25 teachers this summer based in part on their poor ratings from a "value-added" analysis of scores — an increasingly popular and controversial method of rating teacher performance. The Los Angeles Times recently published value-added ratings for 6,000 third-, fourth- and fifth-grade teachers based on students' English and math test scores over seven years. The analysis looks at individual students' past test performance and projects how they should do the next year. The difference between the child's actual and projected results is the estimated "value" that the teacher added during the year.
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