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Evidence Summary

Qualifying studies found no significant positive outcomes.

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To access additional educational research-related resources from the Center for Research and Reform in Education:

Visit ProvenTutoring, a second clearinghouse through JHU that addresses evidence-proven tutoring models, and sign up for the ProvenTutoring newsletter.

Sign up for the twice-monthly Best Evidence in Brief newsletter and visit the Best Evidence in Brief index.

Visit the Best Evidence Encyclopedia.

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