Analyzing Released NYC Value-Added Data Part 2 | Gary Rubinstein's Blog - 0 views
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Jeff Bernstein on 28 Feb 12In part 1 I demonstrated there was little correlation between how a teacher was rated in 2009 to how that same teacher was rated in 2010. So what can be more crazy than a teacher being rated highly effective one year and then highly ineffective the next? How about a teacher being rated highly effective and highly ineffective IN THE SAME YEAR. I will show in this post how exactly that happened for hundreds of teachers in 2010. By looking at the data I noticed that of the 18,000 entries in 2010, about 6,000 were repeated names. This is because there are two ways that one teacher can get multiple value-added ratings for the same year.