Found Effects

The WWC found The Creative Curriculum^® to have no discernible effects on oral language, print knowledge, phonological processing, and 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 WWC Procedures and Standards Handbook, Appendix F). The improvement index represents the difference between the percentile rank of the average student in the intervention condition and the percentile rank of the average student in the comparison condition. Unlike the rating of effectiveness, the improvement index is entirely based on the size of the effect, regardless of the statistical significance of the effect, the study design, or the analysis. The improvement index can take on values between –50 and +50, with positive numbers denoting favorable results for the intervention group.

Based on three studies, the average improvement index for The Creative Curriculum^® for three measures of oral language across three studies is +3 percentile points with a range of –6 to +9 percentile points across findings. The average improvement index for three measures of print knowledge is +3 percentile points across three studies, with a range of –7 to +8 percentile points across findings. Based on two studies, the average improvement index for The Creative Curriculum^® on one measure of phonological processing is –2 percentile points, with a range of –4 to +1 percentile points across findings. The average improvement index across three studies for three measures of math is +4 percentile points, with a range of –5 to +8 percentile points across findings.

Summary

The WWC reviewed eight studies of The Creative Curriculum^®. One of these studies meets WWC evidence standards, and two of these studies meet WWC evidence standards with reservations. Five studies do not meet either WWC evidence standards or eligibility screens. Based on the three studies, the WWC found no discernible effects of The Creative Curriculum^® on oral language, print knowledge, phonological processing, and math. The conclusions presented in this report may change as new research emerges.