| Abbreviation | Definition |
|---|---|
| REI | Regular Education Initiative |
| REI | Research and Educational Institute |
| REI | Research Education Innovation |
| REL | Regional Educational Laboratory |
| REL | Research, Evaluation and Learning |
| RELATE | Reaching Encouraging Learning Achieving Teaching Excelling |
| RELATE | Realizing Educational Leadership And Teaching Excellence |
| RELATE | Relationship Education Leading Adolescents Toward Empowerment |
| RELAY | Refining The Educational Link To Americas Youth |
| RELAYS | Regional Education Legacy for Art and Youth Sport |
| RELC | Redmond Early Learning Center |
| RELOAD | Reusable E Learning Object Authoring Delivery |
| REMC | Regional Educational Media Center |
| REMC | Regional Educational Media Centers |
| REMEND | Renal Empowered Mentors for Education in Nephrology Dialysis |
| REMP | Research Educational Measurement and Psychometrics |
| REMS | Readiness and Emergency Management for Schools |
| RENO | Renovation |
| REP | Registered Education Provider |
| REP | Registered Education Providers |