Letter to Request a Functional Behavior Assessment (FBA)

Expert Reviewedby Mary

"I've sat at over 500 IEP tables."

I'm Mary, a Special Education Advocate and the founder of The Advocate Ally. I created this special education resource because too many parents feel pressured to accept generic, "cookie-cutter" IEPs.

The guidance below is grounded in the same practical, document-based questions I raise in IEP meetings every day. Use it to ask for clearer, more individualized support for your child.

Mary

Founder, The Advocate Ally

⚠️ Before you send anything: Ground the request in the written record. Upload your IEP first for a free audit to identify document sections worth referencing.

Legal Basis

34 CFR §300.324(a)(2)(i) — The IEP team must consider positive behavioral interventions when behavior impedes learning.

The Letter Template

Copy & Customize

Dear [Special Education Director/Principal],

I am writing to formally request a Functional Behavior Assessment (FBA) for my child, [Child's Full Name], currently in [Grade] at [School Name].

My child is exhibiting the following behaviors at school:
• [Behavior 1 — e.g., "Leaving the classroom without permission (elopement)"]
• [Behavior 2 — e.g., "Verbal outbursts during transitions"]
• [Behavior 3 — e.g., "Physical aggression toward peers during unstructured time"]

These behaviors are impacting my child's ability to learn and the learning of others. I believe a Functional Behavior Assessment is necessary to identify the function (purpose) of these behaviors so that an effective Behavior Intervention Plan (BIP) can be developed.

I understand the school has [state timeline] to respond to this request and to either proceed with the FBA or issue a Prior Written Notice (PWN) explaining why the FBA is not warranted.

Sincerely,
[Your Name]
[Date]

Pro Tips for Using This Letter

An FBA looks at the antecedent (trigger), behavior, and consequence to find the ROOT CAUSE.

Without an FBA, a BIP is just guessing — the plan must be based on real data.

If the school already has a BIP but no FBA, the BIP may not be legally sufficient.

You can request an independent FBA if you disagree with the school's results.

What Happens After You Send This Letter

Save a copy of the letter and the delivery confirmation (email receipt or certified mail tracking). This is your evidence trail.

Mark your calendar for the response timeline that applies to this request in your state. If you do not hear back, send a written follow-up referencing the original date.

If they schedule a meeting in response, prepare just like you would for any IEP meeting. Bring a support person and ask for time to review anything you do not understand.

If they refuse or propose a change covered by Prior Written Notice, ask for the notice in writing so the decision and reasons are documented.

Upload your IEP for a free audit before the meeting. The review can flag written gaps and weak language worth discussing.

Not Sure What to Ask For?

A letter is stronger when it points to the written record. Upload your IEP to flag document sections worth referencing and questions worth raising.

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Frequently Asked Questions

Should I email this letter or send it as certified mail?

Email creates an instant, timestamped paper trail — use that as your primary method. But for formal requests (evaluations, Prior Written Notice, dispute filings), follow up with certified mail so you have proof of delivery the school can't deny.

What if the school doesn't respond to my letter?

Response requirements depend on the request and your state's rules. Send a written follow-up that references the original request and date, keep the delivery record, and consider contacting your Parent Training and Information Center, an advocate, or an attorney if the delay continues.

Can the school retaliate against my child for sending this letter?

No. Retaliation against parents for exercising their rights under IDEA is illegal. If you notice changes in your child's treatment after sending a letter, document everything and report it. This is a separate complaint you can file.

Do I need a lawyer to send this letter?

No. Parents have every right to advocate for their child without an attorney. These templates are written to be used by parents directly. However, if you're heading toward due process or the school is being uncooperative, consulting with a special education advocate or attorney can strengthen your position.

Free Tool

Audit your IEP before sending this letter

Find documented concerns first, then reference the relevant sections in your letter.

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