At present, the Opt Out movement is small a few thousand students in Colorado, several hundred in New Mexico, and smatterings of ad hoc parent groups in the East. Some might view these small numbers as no threat to the accountability assessment industry. But the threat is more serious than it appears. Politicians and others want to rank schools and school districts according to their test score averages. Or they want to compare teachers according to their test score gains (Value Added Measurement) and pressure the low scorers or worse. It only takes a modest amount of Opting Out to thwart these uses of the test data. If 10% of the parents at the school say "No" to the standardized test, how do the statisticians adjust or correct for those missing data? Which 10% opted out? The highest scorers? The lowest? A scattering of high and low scorers? And would any statistical sleight of hand to correct for "missing data" stand up in court against a teacher who was fired or a school that was taken over by the state for a "turn around"? I don't think so.
Gene V Glass
Arizona State University
National Education Policy Center
University of Colorado Boulder
The opinions expressed here are those of the authors and do not represent the official position of the National Education Policy Center, Arizona State University, nor the University of Colorado Boulder.