Research

Twenty-two studies reviewed by the WWC investigated the effects of CMP. Three studies (Ridgway, Zawojewski, Hoover, & Lambdin, 2002; Riordan & Noyce, 2001;³ Schneider, 2000) were quasi-experimental designs that met WWC evidence standards with reservations. The remaining 19 studies did not meet WWC evidence screens.

Ridgway, Zawojewski, Hoover, & Lambdin (2002) included students in grades 6–8 from 18 schools located in the midwestern, western, and eastern regions of the country. Students using the CMP curriculum were compared to students who did not use the curriculum. ⁴

Riordan & Noyce (2001) included eighth-grade students from 50 schools in Massachusetts. Students using the CMP curriculum were compared to students who did not use the CMP program, but used different published textbook programs, which, in the aggregate, represented the instructional norm in Massachusetts.

Schneider (2000) included three cohorts of middle school students from 48 schools in Texas. Students using the CMP curriculum were compared to students who did not use the curriculum.