By Jason Song & Jason Felch|Los Angeles Times|May 7, 2011|11:29 p.m.
Today the Los Angeles Times is releasing a major update to its elementary school teacher ratings, underscoring the large disparities throughout the nation's second-largest school district in instructors' abilities to raise student test scores.
The posting — the only publication of such teacher performance data in the nation — contains value-added ratings for about 11,500 third- through fifth-grade teachers, nearly double the number released last August. It also reflects changes in the way the scores were calculated and displayed.
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