Private Funding Foundation
- Alfred P. Sloan Foundation
- Andrew W. Mellon Foundation
- Annenberg Foundation
- Annie E. Casey Foundation
- Bill & Melinda Gates Foundation
- California Endowment
- California Wellness Foundation
- Charles Stewart Mott Foundation
- David & Lucile Packard Foundation
- Edna McConnell Clark Foundation
- Educational Foundation for America
- Ford Foundation
- Foundation Center
- Henry J. Kaiser Family Foundation
- John & Mary R. Markle Foundation
- Kresge Foundation
- Oak Ridge Institute for Science and Education
- Pew Charitable Trusts
- Robert Wood Johnson Foundation
- Rockefeller Foundation
- Sierra Health Foundation
- Soros Foundations Network
- Spencer Foundation
- Stuart Foundation
- Tinker Foundation, Inc.
- Turner Foundation, Inc.
- W.K. Kellogg Foundation
- William & Flora Hewlett Foundation
- William T. Grant Foundation