The goal of this study is to better understand how methods for estimating treatment effects of latent groups operate. In particular, the authors identify where violations of assumptions can lead to biased estimates, and explore how covariates can be critical in the estimation process. For each set of approaches, the authors first review the…

When randomized control trials (RCT) are not feasible, researchers seek other methods to make causal inference, e.g., propensity score methods. One of the underlined assumptions for the propensity score methods to obtain unbiased treatment effect estimates is the ignorability assumption, that is, conditional on the propensity score, treatment…

Word Generation (WG) is a research-based vocabulary program for middle school students designed to teach words through language arts, math, science, and social studies classes. The program consists of weekly units that introduce 5 high-utility target words through brief passages designed to spark active examination and discussion of contemporary…

One of the primary obstacles facing education researchers today is the struggle to obtain student-level data from states, districts, and schools. Researchers typically face one of two scenarios; they must either (1) work with contractors hired by the state or district to handle data requests who can be prohibitively expensive or (2) invest…

This paper is the first summary of two studies and 10 years of evaluating the Milwaukee Parental Choice (voucher) Program (MPCP). This paper discusses school voucher evaluations in general terms and how these studies are carried out. The paper outlines the types of studies completed in "Study I" and "Study II" and the results…

Research has proven that teachers have a fundamental influence on student results. Moreover, effective teacher professional development is one of the key mechanisms for improving student achievement. By the most recent OECD (Organisation for Economic Cooperation and Development) definition, "Professional development is defined as activities…

The evidence that teacher preparation programs have an impact on teacher quality is often limited. Progress in research on this topic will remain rather limited in its influence on practice until more proximal measures of teacher education outcomes can be established. The dearth of variables to measure the impact of teacher preparation programs on…

This presentation focuses on the quasi-experimental methods used to select comparison schools for an evaluation of a federal investing in innovation (i3) validation grant. The Northeast Tennessee College and Career Ready Consortium (NETCO) consists of 29 high schools participating in a five-year program to expand students' access to rigorous…

As a result of the 1998 reauthorization of Head Start, the Department of Health and Human Services conducted a national evaluation of the Head Start program. The goal of Head Start is to improve the school readiness skills of low-income children in the United States. There is a substantial body of experimental and correlational research that has…

With research indicating substantial differences among teachers in terms of their effectiveness (Nye, Konstantopoulous, & Hedges, 2004), a major focus of recent research in education has been on improving teacher quality through professional development (Desimone, 2009; Institute of Educations Sciences [IES], 2012; Measures of Effective…

Large scale longitudinal research (Morgan, Farkas, & Wu, 2009) and a meta-analysis (Duncan et al., 2007) have found that early mathematics achievement is a strong predictor of later mathematics achievement. In fact, end of Kindergarten and end of grade 1 mathematics achievement on ECLS-K and similar mathematics proficiency measures tends to be…

The goals of the Head Start Impact Study (HSIS) are to: (1) determine the impacts of Head Start on children's school readiness and parental practices that support children's development; and (2) to determine under what circumstances Head Start achieves its greatest impacts and for which children (US Department of Health and Human Services, 2010).…

This study examines changes in parent support and child emergent literacy skills over time as children moved from Head Start into kindergarten. It compares the transactional parent-child influences in families randomly assigned in Head Start to receive an enriched home visiting program that emphasized parents as teachers relative to a control…

To provide greater support for students as they transition to ninth grade, the Texas Legislature funded the Texas Ninth Grade Transition and Intervention (TNGTI) grant program. TNGTI grantees implemented a variety of supports to at-risk students transitioning to ninth grade, including a summer transition program, an early warning data system, and…

One approach some U.S. schools now use to combat high rates of adolescent substance use is school-based mandatory-random student drug testing (MRSDT). Under MRSDT, students and their parents sign consent forms agreeing to the students' participation in random drug testing as a condition of participating in athletics and other school-sponsored…