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What Works Clearinghouse

U.S. Department of Education
Institute of Education Sciences
WWC Guided Tour
  
The WWC offers a range of publications that evaluate beginning reading interventions and instructional strategies for students in grades K-3. These interventions and strategies are intended to increase skills in alphabetics, reading fluency, comprehension, and general reading achievement.
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Population Served
Approach
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Evidence Rating Key
Positive effects Positive Effects: strong evidence of a positive effect with no overriding contrary evidence.
No discernible effects No Discernible Effects: no affirmative evidence of effects.
Potentially positive effects Potentially Positive Effects: evidence of a positive effect with no overriding contrary evidence.
Potentially negative effects Potentially Negative Effects: evidence of a negative effect with no overriding contrary evidence.
Mixed effects Mixed Effects: evidence of inconsistent effects.
Negative Effects Negative Effects: strong evidence of a negative effect with no overriding contrary evidence.
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