American Statistical Association Statement on Value-Added Models
Use of VAM for Educational Assessment
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 in student background. VAMs are increasingly promoted or mandated as a component in high-stakes decisions such as determining
compensation, evaluating and ranking teachers, hiring or dismissing teachers, awarding tenure, and closing schools.
As the largest organization in the United States representing statisticians and related professionals, the American Statistical Association (ASA) is making this statement to provide guidance, given current knowledge and experience, a
s to what can and cannot reasonably be expected from the use of VAMs.