"Caring School Community"[TM] ("CSC") is a modified version of a program formerly known as the "Child Development Project" ("CDP"). The "CSC" program has been recently revised to eliminate some elements of the "CDP" that were shown in evaluation studies to be inconsistently or poorly implemented. It is a multiyear school improvement program that involves all students in grades K-6. The program aims to promote core values, prosocial behavior, and a schoolwide feeling of community, and consists of four elements: class meeting lessons, cross-age "buddies" programs, "homeside" activities, and schoolwide community. Two studies reviewed by the What Works Clearinghouse (WWC) investigated the effects of the "CDP," an earlier version of "CSC." The studies are referred to as the "San Ramon Study" and the "Six-District Study" because there are many documents for each study. The San Ramon Study was a randomized controlled trial that met WWC standards with reservations. The Six-District Study used a quasiexperimental design that also met WWC evidence standards with reservations. The San Ramon Study included more than 600 students a year from two cohorts of grades K-4 in 27 classrooms in six elementary schools serving a middle- to upper-class suburban community in San Ramon, California. Outcomes for students in the three schools using "CDP" were compared to those for students in three matched comparison schools. The Six-District Study assessed approximately 5,500 grades 3-6 students each year for four consecutive years in 24 elementary schools in six school districts across the United States. Outcomes for students in schools using "CDP" were compared with those for students in matched comparison schools. Both studies focused on "CDP" implemented as a schoolwide intervention. The WWC found "CDP" to have potentially positive effects on behavior; no discernible effects on knowledge, attitudes, and values; and no discernible effects on academic achievement. (Contains 17 tables and 11 footnotes.) [This publication was produced by the What Works Clearinghouse. The following studies are reviewed in this intervention report: (1) the "San Ramon Study"; and (2) the "Six-District Study." Each study is represented by many documents.]