Source: (2010) John D. and Catherine T. MacArthur Foundation.Models for Change provides funding, technical assistance, and other forms of support to a range of juvenile justice systems reform efforts in four key partner states: Pennsylvania, Illinois, Louisiana, and Washington. By supporting change in a variety of sites, and on a range of issues, Models for Change is helping to generate multiple models of systems reform—all home-grown, but all capable of being studied, shared, and adapted elsewhere. This report briefl y summarizes four promising practice innovations that have emerged from this work. Each is a locally developed response to a core challenge faced by juvenile justice practitioners everywhere. The four innovations include: Pennsylvania Academic and Career/Technical Training (PACTT) Alliance; Peacekeeping Circles—expanding informal alternatives in Peoria, Illinois; Jefferson Parrish—dealing with racial disparities at the front door in Louisiana; and King County—uniting for youth in Washington.