The Annenberg Foundation, Inc.

The Atlantic Philanthropies (USA) Inc.

Booth Ferris Foundation

The Robert Browne Foundation, Inc.

The Annie E. Casey Foundation

Center for Substance Abuse Prevention (CSAP), Substance Abuse and Mental Health Services Agency, U.S. Dept. of Health and Human Services

The Danforth Foundation

The DuBarry Foundation

The Ford Foundation

William T. Grant Foundation

Evelyn and Walter Haas, Jr. Fund

Walter & Elise Haas Fund

The Horace Hagedorn Foundation

J. David & Pamela Hakman Family Foundation

Hasbro Children's Foundation

Charles Hayden Foundation

The William Randolph Hearst Foundation

Clarence E. Heller

The William and Flora Hewlett Foundation

The James Irvine Foundation

The Robert Wood Johnson Foundation

Walter S. Johnson Foundation

Ewing Marion Kauffman Foundation

W.K. Kellogg Foundation

John S. and James L. Knight Foundation

Lilly Endowment, Inc.

Longview Foundation

Louis R. Lurie Foundation

The MBK Foundation

Mr. & Mrs. Sanford N. McDonnell

The John D. and Catherine T. MacArthur Foundation

A.L. Mailman Family Foundation, Inc.

Charles Stewart Mott Foundation

National Institutes of Health, National Institute on Drug Abuse (NIDA)

National Science Foundation

New York Life Foundation

Nippon Life Insurance Foundation

Karen and Christopher Payne Foundation

The Pew Charitable Trusts

The Pinkerton Foundation

The Rockefeller Foundation

Louise and Claude Rosenberg, Jr. Family Foundation

The San Francisco Foundation

Shinnyo-En Foundation

Silver Giving Foundation

The Spencer Foundation

Spunk Fund, Inc.

W. Clement & Jessie V. Stone Foundation

Stuart Foundation

The Stupski Family Foundation

The Sulzberger Foundation, Inc.

Surdna Foundation

John Templeton Foundation

U.S. Department of Education, Office of Educational Research & Improvement (OERI)

Wallace-Reader's Digest Funds

Wells Fargo Bank