Randomized trials of educational interventions often face logistical hurdles (Cook, 2002). For example, sometimes they are prevented from reaching their full-term. This would happen if, as a condition of participation, subjects insist on receiving the treatment program within a certain timeframe. This timeframe may be shorter than the full-term…

Randomized experiments have become an increasingly popular design to evaluate the effectiveness of interventions in education (Spybrook, 2008). Many of the interventions evaluated in education are delivered to groups of students, rather than to individuals. Experiments designed to evaluate programs delivered at the group level often…

The purpose of this design experiment was to research, test and iteratively design a set of taxonomically-organized storybooks that served to scaffold young children's word learning and concept development. Specifically, Phase 1 of the design experiment asked: (1) What are the effects of taxonomic organization on children's ability to acquire…

In recent years, attention in the education community has focused on the need for evidenced-based research, particularly educational policies and interventions that rest on "scientifically based research". The emphasis on scientifically based research in education has led to a corresponding increase in studies designed to provide strong warrants…

School choice options--including both voucher and neo-voucher options like tuition tax credit funded scholarship programs--have become increasingly prevalent in recent years (Howell, Peterson, Wolf and Campbell, 2006). One popular argument for school choice policies, drawing from economic theory, is that public schools will improve the education…

The present research represents a test of the effect of adding seriation instruction to oddity instruction to produce an advantage in both forms of abstraction. Pasnak et al. (2007) and Kidd, Pasnak, Gadzichowski, Ferral-Like, & Gallington (2008) have shown that at risk kindergartners profit academically from instruction in both oddity and…

For this project, the authors use data from four IES-sponsored randomized studies to examine some of the key issues identified in May et. al. (2009). The first set of questions focuses on issues related to using state tests: (1) Do studies meet the assumptions needed for combining impacts on state tests across grades and/or states?; (2) How…

Causal inference is central to educational research, where in data analysis the aim is to learn the causal effects of educational treatments on academic achievement, to evaluate educational policies and practice. Compared to a correlational analysis, a causal analysis enables policymakers to make more meaningful statements about the efficacy of…

In this paper, the authors report research focused directly on the validation of the Coding of Academic Teacher-Student interactions (CATS) direct observation instrument. They use classroom information gathered by the CATS instrument to better understand the potential mediating variables hypothesized to influence student achievement. Their study's…

Instrumental variable estimators hold the promise of enabling researchers to estimate the effects of educational treatments that are not (or cannot be) randomly assigned but that may be affected by randomly assigned interventions. Examples of the use of instrumental variables in such cases are increasingly common in educational and social science…

The purpose of this research was to investigate the impact of tier 2 instruction on the comprehension and vocabulary of first grade students identified with low language and vocabulary skills. Specifically, the authors conducted a pilot study within the context of federally funded efficacy research to examine whether students participating in…

The main objective of the overall Targeted Reading Intervention (TRI) was to help the classroom teacher acquire the key reading diagnostic strategies (e.g., Cooter, 2003; Desimone, 2009; Garet et al., 2001; Timperley & Phillips, 2003) relevant to K-1 struggling readers (e.g., Desimone, 2009; Garet et al., 2001; Guskey, 2002; Joyce & Showers, 2002;…

The purpose of this study is to rigorously examine the implementation and impact of the Early College High School (ECHS) model in North Carolina. The primary goal of the ECHS model is to increase the number of students who graduate from high school and who continue on and succeed in college. Therefore, the anticipated long-term outcomes for the…

The National Center for Research on Early Childhood Education's (NCRECE) program of research is a series of experimental studies of specific approaches to training early childhood (EC) educators to be effective in implementation of curriculum and instructional interactions focused on promoting language and literacy skills, two domains that operate…

Given that problems with number sense may have a causal influence on students' math learning difficulties and there is a lack of empirical studies that have examined the effectiveness of number sense interventions for kindergarten students with math difficulties, the purpose of the present study was to evaluate the effectiveness of number sense…