When students are given enough time to cover more than half of grade-level content, ST Math demonstrates a consistent, robust advantage of 0.4 standard deviations in the percentage of students meeting or exceeding proficiency standards over the first 1-3 years of use. This exceeds the federal What Works Clearinghouse (WWC) criteria of 0.25 for “substantively important” effect.
State-wide studies regularly compare rates of math proficiency between those school groups who use ST Math for the first time and those who don’t. Effect size is the standard measure of the magnitude of an effect. It represents the change, measured in standard deviation, in grade-average math achievement that can be expected when the grade group adopts ST Math. See 2015-16 Florida Math Outcomes Analysis to dive deeper into ST Math impact data.