Scientific Evidence
What Works Clearinghouse ( or WWC ) reviewed the evidence in support of the Everyday Mathematics program. Of the 61 pieces of evidence submitted by the publisher, 57 did not meet the WWC minimum standards for scientific evidence, four met evidence standards with reservations, and one of those four showed a statistically significant positive effect. Based on the four studies considered, the WWC gave Everyday Math a rating of "Potentially Positive Effect" with the four studies showing a mean improvement in elementary math achievement (versus unspecified alternative programs) of 6 percentile rank points with a range of -7 to +14 percentile rank points, on a scale from -50 to +50.
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