Collaborators
Several of Horizon's projects have involved collaboration with universities and other research institutions such as:
- Abt Associates, Inc.
- Education Development Center
- Eisenhower National Clearinghouse
- National Center for Improving Science Education
- North Carolina State University
- Research Triangle Institute
- TERC
- The Ohio State University
- University of North Carolina at Chapel Hill
- University of Pennsylvania
- WestEd
- Westat, Inc.
- Wisconsin Center for Education Research
HRI has also worked with professional organizations such as:
- American Association for the Advancement of Science
- American Geological Institute
- Association of State Supervisors of Mathematics
- Council of Chief State School Officers
- Council of State Science Supervisors
- National Council of Teachers of Mathematics
- National Science Teachers Association