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Teachers' data reports place them in one of five categories depending on how much they were able to boost their students' test scores over the course of several years.

Reports ranking teachers on how much they were able to increase students’ test scores from one year to the next arrived in principal’s inboxes this week, and this time Department of Education officials say the reports are simpler and fairer than in years past.

First released in 2008, teacher data reports have rankled teachers who object to being judged solely on test scores and confused principals, some of whom found the reports too complicated to use. The reports released this week cover 12,000 teachers and address some of those concerns. They contain less information, are easier to read, and use a new formula to calculate teachers’ value-added scores.

This year, Chancellor Joel Klein has made it clear what should be done with the data: one in ten teachers who are up for tenure will have their reports used as a criteria in their tenure evaluations.

On Tuesday morning, principals with students in grades 3-8 — the state gives yearly math and English tests to these students — were given school summary reports. Teachers won’t receive their individual data reports until next week. The vast majority work in traditional public schools, as less than a dozen charter schools chose to participate, according to the Department of Education’s chief talent officer, Amy McIntosh. (more…)