“Individualized Education Programs (IEPs) and 504 plans are common kinds of school supports for students with disabilities. Learn how these plans are alike and how they’re different.”
“IEPs and 504 plans are both designed to support students with disabilities. But they work in different ways. This comparison chart shows the differences.”
https://www.understood.org/en/articles/the-difference-between-ieps-and-504-plans