photo © 2011 Caroline (via: Wylio)"The study examined the relative effectiveness of four early elementary school math curricula: Investigations in Number, Data, and Space; Math Expressions; Saxon Math; and Scott Foresman-Addison Wesley Mathematics.
The study analyzed data on more than 8,000 first- and second-grade students in 110 schools in 12 districts in 10 states....
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For first graders, the authors found no statistically significant differences in student math achievement among the curricula after adjusting results for multiple curricula comparisons within the same analysis.
For second graders, one difference was statistically significant after taking multiple curricula comparisons into account. Second-grade students attending Saxon Math schools scored 0.17 standard deviations higher than students attending Scott Foresman-Addison Wesley Mathematics schools, roughly equivalent to moving a student from the 50th to the 57th percentile in math achievement."
Additional information about the programs studied is here:
http://ies.ed.gov/ncee/wwc/publications/quickreviews/QRReport.aspx?QRId=170
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