Despite the concerns regarding value-added models (VAMs), advocates hold strong to VAMs' theoretical strengths and potentials, while adopting a set of agreed-upon albeit "heroic" set of assumptions, without research in support. These assumptions transcend promotional, policy, media, and research-based pieces, but they have never been…

The specifics of how growth models should be constructed and used for educational evaluation is a topic of lively policy debate in states and school districts nationwide. In this article, we take up the question of model choice--framed within a policy context--and examine three competing approaches. The first approach, reflected in the popular…

Currently, a significant number of states are in the process of implementing a high-stakes teacher evaluation (HSTE) system. In many ways, Louisiana's teacher evaluation system, "Compass," is typical of the models that many states have adopted. This article reports the experiences of 37 elementary teachers from five districts across…