C
- Cairn University
- Cal Poly Pomona
- Cal Poly State University
- Cal State L.A.
- Cal State Long Beach
- California Baptist University
- California Institute of Technology
- California Maritime Academy
- California State University Fresno
- California State University, Chico
- California State University, Monterey Bay
- Cambridge College
- Canadian Valley Technoology Center
- Canisius College
- Capitol College
- Carnegie Institution for Science
- Carnegie Mellon University
- Carsten Institute New York LLC
- Cascadia Community College
- Castleton University
- Cazenovia College
- Centenary College of Louisiana
- Central Carolina Community College
- Central Institute for the deaf
- Central Maine Community College
- Central Pa Institute of Science and Technology
- Central Tech
- Centralia School District
- Centura College
- Chaffey College
- Chapin School
- Chapman University
- Charles R. Drew University of Medicine and Science
- Charlotte School of Law
- Charter Oak State College
- Chattanooga State Community College
- Chemeketa Community College
- Children's Hospital Corporation
- Children's Hospital Los Angeles
- Children's Hospital of Philadelphia
- Chippewa Valley Technical College
- Choate Rosemary Hall
- Christian Brothers University
- CHSBS Techs Central Michigan University
- Cincinnati College of Mortuary Science
- Clackamas Community College
- Clark Art Institute
- Clark College
- Clark State Community College
- Clarkson University
- Clearwater Christian College
- Clemson University
- Cleveland State University
- Climate Scienced Rapid Response team
- Clover Park Technical College
- Clovis Community College
- Coastal Carolina Community College
- Coastline Community College Foundation
- Cochise College
- Coconino Community College
- Coleman University
- Colgate University
- College of Architecture ITS Department
- College of Central Florida
- College of Charleston
- College of Law at Arizona State University
- College of Saint Mary
- College of Southern Idaho
- College of Staten Island
- College of The Albemarle
- College of the Holy Cross
- Colorado Mesa University
- Colorado Mountain College
- Colorado State University
- Columbia College
- Columbia College Chicago
- Columbia College Hollywood
- Columbia Gorge Community College
- Columbia Southern University
- Columbia University
- Columbia University The Earth Institute
- Columbia University, College of Dental Medicine
- Columbia University, GSAPP
- Columbus College of Art & Design
- Community College of Beaver County
- Conception Abbey/Conception Seminary College
- Concordia College Alabama
- Concordia University Chicago
- Concordia University Irvine ITS
- Connecticut College
- Connors State College
- Conversion Partners
- Copper Mountain College
- Cornell University
- Cossatot Community College
- Crescent School District
- Crowder College
- CSU Northridge
- CSU, San Bernardino
- CSUDH Foundation
- CSU-Global Campus
- C-TEC of Licking County
- Cuesta College
- Cusick School District
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