If you want to learn about the growing movement to opt students out of mandated state and federal testing, go to this meeting in Denver.

Parents, scholars, and educators will convene in one of the nation’s most test-driven, test-obsessed cities and states, where the fate of teachers, principals, and schools depends on standardized test scores, a law foolishly enacted without any evidence at all in 2010. Test scores in Colorado counts for 50% of educator evaluations due to SB191, one of the worst laws in the nation (though by no means unique). In typical “deform” style, the law promises that it will produce “great teachers and great schools” by firing educators whose students don’t get ever higher test scores.

Where is the evidence? Read this summary of the research by Professor Edward Haertel, emeritus, from Stanford University, in an address to the Educational Testing Service. Please note that he concludes that “value-added measures” (the rise or fall of test scores) should not count for a set percentage of any teacher’s evaluation because they are too inaccurate and unstable.

He is measured and polite.

Another way to describe test-based accountability is “junk science.”