New York Evaluations Lose in Court

Daniel Katz, Ph.D.

Sheri Lederman is an experienced teacher in the Long Island district of Great Neck.  This means that she, like every other teacher in the Empire State, has been subjected to an ongoing experiment of teacher evaluation roulette with increasing focus on the “value added” of individual teachers calculated using student standardized test scores plugged into complex statistical formulas.  The method, called “Value Added Modeling,” is meant to account for the various factors that might impact a student’s score on a standardized test, isolate the teacher’s input on the student’s growth during one year of instruction, and determine whether or not the student learned as much as similarly situated students.  The difference between what the VAM predicts and how the student does – for either better or worse – is used to determine whether or not an individual teacher is effective.  VAMs promise to remove some of the subjectivity of teacher…

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