I mixed these up my first year, and I don't think I was the only one. A veteran colleague finally explained it in one sentence: a 504 removes barriers, an IEP changes instruction. Everything else follows from that.
The one-sentence difference
- 504 (Section 504 of the Rehabilitation Act): the student can access the general curriculum with accommodations. No specialized instruction, no separate goals. Think: extended time, preferential seating, a copy of notes, a break card.
- IEP (Individualized Education Program, under IDEA): the student needs specialized instruction to make progress, not just access. It comes with measurable annual goals, a service minutes count, and a team that includes special education staff.
What that means for you day to day
- A 504 lives in your accommodations column. You adjust how the student accesses what everyone else is doing. You do not water down the content or change the standard.
- An IEP lives in your instruction column too. Goals are tied to present levels, and you're often documenting progress toward them, not just implementing accommodations.
- Both are legally binding. "I forgot" is not a defense for either one. If a 504 says extended time and you didn't give it on a quiz, that's a compliance problem, not an oversight.
- Neither is optional based on how the student is doing that week. A good day doesn't mean the plan pauses.
Where AI is genuinely useful, and where it isn't
Useful: drafting accommodation language you can bring to a 504 meeting for the team to refine, or generating a first-draft measurable IEP goal from a present-level description so the special ed case manager isn't starting from a blank page.
Not useful, ever: deciding eligibility, finalizing legal language without your case manager or 504 coordinator, or treating a model's draft as final. These documents get signed by a team, and the team is the safeguard.
A quick gut check for new teachers
1. Is the student accessing the same content everyone else gets, just with support? Probably 504 territory.
2. Is the student working toward a different, individualized goal that gets measured? That's IEP territory.
3. Not sure? Ask your case manager before the first week is over. This is the single most useful five-minute conversation you can have as a new teacher.
A mistake I see a lot in year one
New teachers sometimes treat both documents as a suggestion, giving the accommodation "when there's time" or "if it seems needed that day." Neither document works that way. If a student has extended time written into a 504, it applies to every assessment where extended time is relevant, not just the ones where you remembered. The fix isn't more willpower, it's a system: a one-page per-class list of which students have which accommodations, taped inside your planbook or pinned in your gradebook app, checked before you build any assessment or timed activity.
Where the paperwork actually lives
You don't have to memorize either document cold. What you do need is quick access to the accommodations page, whichever tool your school uses to store them, and thirty seconds before a test to check it. That habit prevents almost every compliance issue new teachers run into, and it takes less time than writing this paragraph took to read.
For a working first draft, our [504 plan accommodations generator](/504-plan) turns student needs and school context into specific, implementable accommodations, and our [IEP goal writer](/iep-goals) drafts measurable goals from present levels, both meant to save your case manager and team time on the draft, not to replace their sign-off.
