Many teacher education researchers have expressed concerns about the lack of rigorous impact evaluations of teacher preparation practices. I summarize these various concerns as they relate to issues of internal validity, measurement, and external validity. I then assess the prevalence of these issues by reviewing 166 impact evaluations of teacher…

Professional development programs are based on different theories of how students learn and different theories of how teachers learn. Reviewers often sort programs according to design features such as program duration, intensity, or the use of specific techniques such as coaches or online lessons, but these categories do not illuminate the…

A review of research suggests that support for team teaching is not based on empirical evidence. Intensive, systematic investigations are needed before the effectiveness or ineffectiveness of team teaching can be substantiated. (MV)

In this article, research conducted in the United States since 1987 on the effects of homework is summarized. Studies are grouped into four research designs. The authors found that all studies, regardless of type, had design flaws. However, both within and across design types, there was generally consistent evidence for a positive influence of…

This article analyzes 41 studies that evaluated K-12 parent involvement programs in order to assess claims that such programs are an effective means of improving student learning. It examines the characteristics of the parent involvement programs, as well as the research design, data, and analytical techniques used in program evaluation. Our…

Reading disabilities are examined from an interactionist perspective. A brief historical perspective of events, a review of selected literature, and a discussion of implications lead to the thesis that research on reading disability must move away from the search for causative factors and toward the specification of conditions for learning.…

Meta analysis techniques were used to synthesize research on teaching students how to control variables when designing an experiment. The review included 65 controlled studies. Findings are reported in terms of the influence on effect sizes of characteristics of the study, instruments used, treatments applied, and results' utilities. (SLD)

The purposes of this paper are: (1) to review some of the major studies of applications of item response theory (IRT) methodology to test equating and synthesize their results; (2) to discuss what questions are as yet unanswered and what problems exist with research methodology; and (3) to provide direction for future research. (Author/LMO)

Meta analysis results were compared with a traditional review of bilingual education program effectiveness. When controlled for methodological inadequacies, participation in bilingual education programs consistently produced differences favoring bilingual education. The methodological inadequacies in the synthesized studies highlights the need for…