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What Works Clearinghouse Rating
Betsy Wolf – Society for Research on Educational Effectiveness, 2023
Introduction: The What Works Clearinghouse (WWC) reviews rigorous research on educational interventions with a goal of identifying "what works" and making that information accessible to educators and policymakers. In rating the quality of causal research, the WWC has historically prioritized internal validity over external validity. One…
Descriptors: Evidence, Program Effectiveness, Educational Research, Validity
Cheung, Alan; Slavin, Robert E.; Lake, Cynthia; Kim, Elizabeth – Society for Research on Educational Effectiveness, 2016
Despite widespread recognition among policy makers, educational leaders, and the nation as a whole of the importance of science, engineering, and technology as drivers of the future of the country and society, the science achievement of America's students is mediocre at best, in comparison to that of international peers. On the 2012 PISA tests in…
Descriptors: Secondary School Science, Science Programs, Middle School Students, High School Students
Slavin, Robert E.; Lake, Cynthia – Society for Research on Educational Effectiveness, 2009
One of the major series of reviews in elementary and secondary education is the Best Evidence Encyclopedia, or the BEE. Up to now, findings for systematic reviews have largely been restricted to the reviews themselves, with few cases in which lessons learned across many reviews using similar methods can be synthesized. The completion of the Best…
Descriptors: Evidence, Direct Instruction, Sample Size, Elementary Secondary Education