1) The document summarizes the Rwanda Expanded Impact Child Survival Project which used community health workers (CHWs) organized into peer support groups to improve child health outcomes in six districts of Rwanda from 2007-2011. 2) The project saw significant increases in positive health behaviors like handwashing and treatment-seeking for malaria/pneumonia as well as immunization rates. 3) Organizing CHWs into small peer support groups provided social support, improved supervision and reporting, and created an effective mechanism for behavior change communication through home visits.