| Abbreviation | Definition |
|---|---|
| ISDL | Institute for Sustainable Development and Learning |
| ISDP | International Standard Diploma Program |
| ISEA | Independent Special Education Advice |
| ISEA | Institute of Special Education Advocacy |
| ISEB | Independent Schools Examinations Board |
| ISEB | Information Systems Examination Board |
| ISEB | International Society for Educational Biography |
| ISEC | Inclusive and Supportive Education Conference |
| ISEC | Inclusive and Supportive Education Congress |
| ISEC | Inquiry Science Education Consortium |
| ISEC | International Science and Education Council |
| ISEE | Idaho System for Educational Excellence |
| ISEE | Informal Science Education Enhancement |
| ISEP | Innovative Special Education Project |
| ISES | Innovative Special Education Services |
| ISES | Integrated Speaker Education System |
| ISET | Instructor Services and Educational Technologies |
| ISGE | Interdisciplinary Studies and Global Education |
| ISHEL | International Study of Higher Education Learning |
| ISI | In-Service Incentive |