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Was the program compared to a control group?
Yes
No
Was the study at least 12 weeks in duration?
Yes
No
Were the program and control groups equivalent in achievement at the pretest? (within half a standard deviation)
Yes
No
Was the post-test a valid test, such as a standardized or state accountability test, not inherent to the program tested?
Yes
No
Were positive effects found in at least 2 studies in which the sample size was at least 5 classes or 125 students per treatment group?
Yes
No
Averaging across all studies, was the average advantage of the program group over the control group at least 20% of a standard deviation?
Yes
No
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