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What Works Clearinghouse

Summarize and compare the evidence of the effectiveness of interventions that address your school or district’s needs.

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Only interventions with research evidence that meets WWC standards are included in the summary results. To view a list of all interventions considered by the WWC, including interventions for which the WWC found no evidence that met standards, search all WWC publications. To find studies of interventions by author name, search the reviewed studies.