Welcome to the SI Index


All nonprofits have effective, high-impact interventions serving large numbers of individuals in need.


Each organization is expanding to serve more people locally or nationally with their successful programs.


Every nonprofit has demonstrated impact validated by third-party studies available on the site.


Welcome to the S&I 100 Index

The S&I 100 is the first-ever broad index of nonprofits with proof of their results and are ready to grow! Choose from among 100 high-impact solutions to America’s most pressing problems and nearly 16,000 local affiliates implementing them. You can easily give to issues and locations you care about and trust you’re making a difference. Click on the issues below to get started!  Read more about our selection process and supporters.


  • Teacher & Principal Training
  • Reading/Math
  • Charter Schools
  • College Access
  • Early Education
  • K-12 Reform


  • Job/Career Development
  • Asset Development
  • Economic Development
  • Housing & Homelessness
  • Microlending


  • After-School & Out-of-School
  • Mentoring
  • Personal & Leadership Development


  • Health Services/Access
  • Maternal & Child Health
  • Mental Health
  • Health Services
  • Aging
  • Fitness & Nutrition