Found Effects

The WWC found Ready, Set, Leap!^® to have no discernible effects for oral language, print knowledge, phonological processing, early reading/writing, or math

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 oral language is +1 percentile points, with a range of –4 to +6 across findings. The average improvement index for print knowledge is +2 percentile points, with a range of –3 to +8 percentile points across findings. The average improvement index for phonological processing is +2 percentile points, with a range of –4 to +11 percentile points across findings. The improvement index for early reading/writing is +3 percentile points for the single outcome in one study. The average improvement index for math is –2, with a range of –9 to +3 across findings in one study.

Summary

The WWC reviewed three studies on Ready, Set, Leap!^®. Two of these studies meet WWC evidence standards and the other did not meet WWC evidence standards. Based on the two studies, the WWC found no discernible effects for oral language, print knowledge, phonological processing, early reading/writing, and math. The conclusions presented in this report may change as new research emerges.