1.     The Centre for Education Reform

2.     Alliance for School Choice

3.     The Heritage Foundation

4.     School Choices

5.     School Choice Info

6.     The Greater Educational Opportunities Foundation

7.     Thomas B. Fordham Foundation

8.     Evergreen Freedom Foundation

9.     The Kennedy School, The University of Harvard

10.   The Milton and Rose D. Friedman Foundation

11.   The CATO Institute

12.   Heartland Institute

13.   Hoover Institution, The University of Stanford

14.   Alliance for Separation of School & State

15.   The National Centre for Policy Analysis

16.   Vermonters for Better Education

17.   The Institute for Justice

18.   The Heartland Institute