Found effects

The WWC found I CAN Learn^® Pre-Algebra and Algebra to have positive effects on math achievement

 

Improvement index

The WWC computes an improvement index for each individual finding. In addition, within each outcome domain, the WWC computes an average improvement index for each study and an average improvement index across studies (see Technical Details of WWC-Conducted Computations). The improvement index represents the difference between the percentile rank of the average student in the intervention condition versus the percentile rank of the average student in the comparison condition. Unlike the rating of effectiveness, the improvement index is based entirely on the size of the effect, regardless of the statistical significance of the effect, the study design, or the analyses. The improvement index can take on values between –50 and +50, with positive numbers denoting results favorable to the intervention group.

The average improvement index for math achievement is +5 percentile points across the 11 samples in the five studies, with a range of –7 to +16 percentile points across findings.

Summary

The WWC reviewed 27 studies on I CAN Learn^® Pre-Algebra and Algebra. One of these studies meets WWC evidence standards; four studies meet WWC evidence standards with reservations; the remaining 22 studies do not meet either WWC evidence standards or eligibility screens. Based on the five studies, the WWC found positive effects in math achievement. The conclusions presented in this report may change as new research emerges.