Edward Haertel: The Flaws of Using Value-Added Models for Teacher Assessment
Haertel notes, "Like all measurements, these scores are imperfect. They are appropriate and useful for some purposes, but not for others. Viewed from a measurement perspective, value-added scores have limitations that make them unsuitable for high-stakes personnel decisions."
Edward Haertel is the Jacks Family Professor of Education, Emeritus, at Stanford University. He is an expert in educational testing and assessment and has been closely involved in the creation and maintenance of California's school accountability system.