Here’s why: Everything that’s in a 504 plan can be included in an IEP. The IEP can also provide
services and supports that would not be available in a 504 plan. So if your child qualifies for an IEP, typically there is no reason to also have a 504 plan.
That said, there are two situations in which some schools might offer both to a student.
First, a school might want to create a separate 504 plan if a student who has an IEP has a temporary injury, like a broken hand. The student might need some writing
for a few weeks. If so, the school might decide to put those temporary accommodations in a 504 plan rather than adding them to the IEP.
Second, even if a child has an IEP, some schools create a separate 504 plan for any medical conditions that don’t directly impact academics. One possible example is a peanut allergy.
But generally a child would not have two plans. It can take a lot of time and energy to manage even just one plan.