Riordan and Noyce (2001) report that schools that used the Connected Mathematics Project (CMP) for two to three years had greater gains in math achievement overall than those in the comparison group. Riordan and Noyce do not report whether this difference was statistically significant. However, t tests calculated by the WWC using data provided by Riordan and Noyce indicate that the difference is not statistically significant. In additional analyses, Riordan and Noyce compared performances on four mathematics topics covered by the outcome measure and found that students in the CMP schools scored statistically significantly higher in all of these areas.