Education policy makers must make decisions under uncertainty. Thus, how they think about risks has important implications for resource allocation, interventions, innovation, and the information that is provided to the public. In this policy brief we illustrate how the standard of evidence for making decisions can be quite inconsistently applied,…

A key job of education policymakers is to make decisions under uncertainty. They must weigh the risks, rewards, and costs of different interventions, policies, and mixes of resources, and make decisions even when the likely outcome is uncertain. How policymakers think about and deal with uncertainty has important implications for resource…

Debates over the efficacy of tenure are longstanding but tenure reform is now more prominent in the public eye given recent high-profile legislative battles in states like Ohio and Wisconsin. This focus on tenure also is a natural outgrowth of the large body of research showing that differences between individual teachers can have profound effects…

This policy brief reviews evidence about the extent to which disadvantaged students are taught by teachers with lower value-added estimates of performance, and seeks to reconcile differences in findings from different studies. We demonstrate that much of the inequity in teacher value added in Washington state is due to differences across different…

In this policy brief we argue that there is little debate about the statistical properties of value-added model (VAM) estimates of teacher performance, yet, despite this, there is little consensus about what the evidence about VAMs implies for their practical utility as part of high-stakes performance evaluation systems. A review of the evidence…

Concerns about the (lack of) diversity of the U.S. teacher workforce--and, in particular, the mismatch between the demographics of the teacher workforce and the nation's students--are not new. Recruitment of minorities into teaching has long been a policy goal, particularly in districts with large percentages of minority students (Dometrius &…

There are good reasons for re-thinking teacher evaluation. Evaluation systems in most school districts appear to be far from rigorous. A recent study showed that more than 99 percent of teachers in a number of districts were rated "satisfactory," which does not comport with empirical evidence that teachers differ substantially from each…

With teacher quality repeatedly cited as the most important "schooling" factor influencing student achievement, there has been increased interest in examining the efficacy of teacher training programs. This paper presents the results of research investigating the relationship between teachers who graduate from different training programs…

Better teacher evaluation should lead to better instruction and improved outcomes for students, but more accurate classification of teachers requires better information than is now available. Because existing measures of performance are incomplete and imperfect, measured performance does not always reflect true performance. Teachers who are truly…

Teacher training programs are increasingly being held under the microscope. Perhaps the most notable of recent calls to reform was the 2009 declaration by U.S. Education Secretary Arne Duncan that "by almost any standard, many if not most of the nation's 1,450 schools, colleges, and departments of education are doing a mediocre job of…

As part of Washington State's efforts to ensure and improve the quality of the teacher workforce, the Professional Educator Standards Board (PESB), with assistance from Educational Testing Services (ETS), has recently introduced a new, evidence-based assessment of teachers called the ProTeach Portfolio. The development of ProTeach was mandated by…

In this paper we examine the mobility of early-career teachers of varying quality, measured using value-added estimates of teacher performance. Unlike previous studies that have examined these issues, we focus on the variation in these effects across the effectiveness distribution. We find that, on average, more effective teachers tend to stay in…

This paper reports on findings based on analyses of a unique dataset collected by ACT that includes information on student achievement in a variety of subjects at the high school level, which allow us to examine the relationship between teacher effect estimates derived from VAM specifications employing different student learning assumptions.…

Economic theory commonly models unobserved worker quality as a given parameter that is fixed over time, but empirical evidence supporting this assumption is sparse. In this paper we report on work estimating the stability of value-added estimates of teacher effects, an important area of investigation given that new workforce policies implicitly…