While the Open Textbook Library is supported by the Open Textbook Network, these campuses, groups, and institutions have made significant contributions to the growth and success of the Open Textbook Library.
College of Education and Human Development, University of Minnesota
The William and Flora Hewlett Foundation
University of Minnesota Libraries
Scholarly Publishing and Academic Resources Coalition (SPARC)
US Public Interest Research Group (PIRG)
Open Education Group
Colorado State University Libraries