Home > Uncategorized > Every Teacher in the U.S. Should Post This Statement in His or Her Classroom

Every Teacher in the U.S. Should Post This Statement in His or Her Classroom

November 23, 2014

If VAM is statistically invalid for classroom teachers who provide direct instruction in classes that instruct students in tested material, how could the use of VAM be valid in ANY way for SpED, Music, Art, PE, MS Science, MS Social Studies, the majority of HS content areas, etc. etc.? By my back of the envelope calculation a majority of teachers could not be measured by VAM even it it WAS a statistically valid calculation. My fear: Lamar Alexander and other reformers will solve this problem by giving more tests to more children in more subjects.

Diane Ravitch's blog

This is the executive summary of the statement of the American Statistical Association on the use of value-added assessment to evaluate teachers. Please share it with other teachers, with principals, and school board members. Please share it with your legislators and other elected officials. Send it to your local news outlets. The words are clear: Teachers account for between 1 and 14% of the variation in test scores. And this is very important to remember: “Ranking teachers by their VAM scores can have unintended consequences that reduce quality.”

ASA Statement onUsing Value-Added Models for Educational Assessment

April 8, 2014

Executive Summary

Many states and school districts have adopted Value-Added Models (VAMs) as part of educational accountability systems. The goal of these models, which are also referred to as Value-Added Assessment (VAA) Models, is to estimate effects of individual teachers or schools on student achievement while accounting for differences…

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