There are many different agencies, organizations and programs working to improve outcomes for children throughout the United States. You can learn more about some of these agencies, organizations and programs below.
National Juvenile Defender Center
http://njdc.info/
Office of Juvenile Justice and Delinquency Prevention
https://www.ojjdp.gov/
The Annie E. Casey Foundation Juvenile Detention Alternatives Initiative
http://www.aecf.org/work/juvenile-justice/jdai/