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.
[7] The debate has continued at the state and local level as school districts across the country consider the adoption of Everyday Math.
California has one of the most rigorous textbook adoption processes and in January 2001 rejected Everyday Mathematics for failing to meet state content standards.
The fact that they singled out Everyday Math while approving all 162 other books and educational materials raised questions about the board's legal powers.
[12] The state of Texas dropped Everyday Mathematics, saying it was leaving public school graduates unprepared for college.