What is the difference between a 504 plan and an IEP?

A 504 plan provides the student with accommodations in their current classrooms. IEPs provide special education services outside of their current classroom.

For details about qualifying disabilities and other differences between 504 plans and IEPs, review A Parent and Educator Guide to Section 504 from the U.S. Department of Education: https://www2.ed.gov/about/offices/list/ocr/docs/504-resource-guide-201612.pdf