Much of the currently available evidence on the causal effects of public prekindergarten programs on school readiness outcomes comes from studies that use a regression-discontinuity design (RDD) with the age cutoff to enter a program in a given year as the basis for assignment to treatment and control conditions. Because the RDD has high internal…

This study explores the extent to which differences in research design explain variation in Head Start program impacts. We employ meta-analytic techniques to predict effect sizes for cognitive and achievement outcomes as a function of the type and rigor of research design, quality and type of outcome measure, activity level of control group, and…

This article examines the power analyses for the first wave of group-randomized trials funded by the Institute of Education Sciences. Specifically, it assesses the precision and technical accuracy of the studies. The authors identified the appropriate experimental design and estimated the minimum detectable standardized effect size (MDES) for each…

Actions that the South Carolina Department of Education suggests to agencies completing the development of a Request for Proposal (RFP) are presented. Four parts of the RFP include: (1) scope of work; (2) proposal bidding and contractual information; (3) proposal evaluation; and (4) preparation guide. (RL)

A design for evaluation studies of educational programs should provide valid and defensible inferences. Goals of evaluation are the identity of major components of inferences and specific validity concerns. Design problems may be resolved by creatively utilizing features of specific evaluations in designing unique conditions that permit valid…

The relative merits of two prominent lines of inquiry into the linkage between organizational culture and effectiveness (culture type and strong culture hypotheses) were studied with 334 colleges and universities. Findings support both approaches and suggest that alternative culture types are differentially effective on different performance…

The following four integrative data analysis strategies for mixed-method evaluation designs are derived from and illustrated by empirical practice: (1) data transformation; (2) typology development; (3) extreme case analysis; and (4) data consolidation and merging. Use of these methods to realize the full potential of mixed-method approaches is…

This article presents evidence from a national evaluation of the effects of 21st Century Community Learning Center after-school programs. The study was conducted in 12 school districts and 26 after-school centers, at which 2,308 elementary school students who were interested in attending a center were randomly assigned either to the treatment or…

Longitudinal research demonstrates that: (1) initial consensual goals are formalized incrementally over time; (2) directions of these changes are influenced by constituencies participating in policy formation as well as broader social movements; and (3) evidence for longitudinal implementation studies needs to be garnered from a confluence of…

Issues related to designing educational indicators with comparisons among similar places are presented, using examples from indicators of school and district performance used by different states. As an illustration, alternative strategies are applied to calculate indicators of state high school graduation rates. (SLD)

Conclusion about site-specific determinants of educational outcomes of the controversial longitudinal evaluation of the Follow Through programs (1976) are challenged again by reexamining the Direct Instruction model data. Reanalysis confirms earlier critiques and supports more recent research funding on the relationship between types of…

Utilizing the regression-discontinuity research design, this article explores the effectiveness of a developmental English program in a large, multicampus community college. Routinely collected data were extracted from existing records of a cohort of first-time college students followed for approximately 6 years (N = 1,473). Results are consistent…

Methodological features are suggested for a possible new national longitudinal study of teachers' careers. Six key principles of research design are presented and used to assert that the new study must be truly longitudinal with measurements on at least six occasions over at least 12 years. (SLD)