The school wants to do a functional behavior assessment. What is it?

It's a structured way for the school team to watch your child's behavior, write down what happens right before it and right after it, and work out what the behavior gets your child, whether that's escape from a hard task, attention, a sensory need, or access to something they want. It isn't a punishment and it isn't a verdict on your child's character. It's the first half of a two-part process: the assessment comes first, and a written plan that teaches a replacement skill comes after.

What actually happens during an FBA?

Someone on the team, often a school psychologist, special education teacher, or a board certified behavior analyst if the district has one, collects data on your child's behavior across settings and times of day. That usually means direct observation in the classroom, the cafeteria, the hallway, wherever the behavior shows up, plus a look at attendance and discipline records, and interviews with you and your child's teachers. The team records the antecedent, meaning what happened right before the behavior, the behavior itself in specific terms, and the consequence, meaning what happened right after, including what your child got or got out of. From that pattern the team builds a hypothesis about the behavior's function. Nothing about this process should feel like your child is in trouble. It's information gathering, not discipline.

When is the school required to do one?

In the US, under IDEA, if your child is removed from their current placement for a disciplinary violation and the school determines the behavior wasn't caused by their disability, or if the removal totals more than 10 school days and counts as a change of placement, the school must, as appropriate, conduct a functional behavioral assessment and provide behavioral intervention services designed to keep the behavior from happening again (34 CFR 300.530). Outside the US, ask your child's school what triggers a formal behavior assessment under your own country's rules. Separately, whenever a child's behavior gets in the way of their own learning or another student's, the IEP team must consider positive behavioral interventions and supports as part of writing or revising the IEP (34 CFR 300.324). You don't have to wait for a crisis. You can ask the team, in writing, to conduct an FBA any time you think one would help, whether or not a discipline event has happened.

Do I have to agree to it, and what's my role?

If the FBA is part of a new evaluation, the school needs your informed written consent first (34 CFR 300.300), and either you or the school can be the one who requests that evaluation (34 CFR 300.301). If it's folded into an existing IEP process, the rules on notice and your involvement still apply, so ask the case manager to walk you through exactly what's happening and why. Your role here matters more than a signature. You know what a hard morning looks like at home, what sets your child off, what calms them, and what they're already doing instead of the behavior on a good day. Bring that to the table before the observations start, not after the report is written, and ask how your input will show up in the final document.

What does a good FBA actually look like?

It draws on data collected in more than one setting, not a single bad afternoon. It relies on what was directly observed and counted, not on staff opinions about why your child is behaving that way. It includes your input and, where your child can give it, your child's own perspective. And it ends with a hypothesis stated in one clear sentence, something like your child does this behavior to escape a demand, or to get adult attention, or because a sensory need isn't being met. If the document you get back doesn't have a plain, specific hypothesis like that, or if it reads like a list of things staff already tried, ask the team to walk you through what the data actually showed and what function it points to.

What happens after the assessment: the behavior plan?

The product of an FBA is a behavior intervention plan, or BIP, and its job is to teach your child a replacement skill that gets the same need met in a way that works better for everyone, plus changes to the setting that make the old behavior less necessary in the first place. A plan that only lists consequences for the behavior, with nothing about what your child gets taught to do instead, is an incomplete plan. Ask for that piece by name. Once it's written, the BIP becomes part of your child's IEP, gets reviewed on the same schedule as the rest of the IEP, and should get updated if the data shows it isn't working. Ask when the next review is and how progress will be measured between now and then.

• Ask the team to state the behavior's likely function in one plain sentence before you sign off on the plan.
• Ask to see the actual observation data, not just a summary, so you can follow the team's reasoning.
• Share what you already know works and doesn't work at home before the observations start.
• Ask what replacement skill your child will be taught to use instead of the behavior.
• Download the free ABCs of Autism guide as your one-source starting point.

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Next: Iep vs 504 plan for a child with autism

• U.S. Department of Education, Individuals with Disabilities Education Act, 34 CFR 300.530, "Authority of school personnel" (current) https://sites.ed.gov/idea/regs/b/e/300.530
• U.S. Department of Education, Individuals with Disabilities Education Act, 34 CFR 300.324, "Development, review, and revision of IEP" (current) https://sites.ed.gov/idea/regs/b/d/300.324
• U.S. Department of Education, Individuals with Disabilities Education Act, 34 CFR 300.300, "Parental consent" (current) https://sites.ed.gov/idea/regs/b/d/300.300
• U.S. Department of Education, Individuals with Disabilities Education Act, 34 CFR 300.301, "Initial evaluations" (current) https://sites.ed.gov/idea/regs/b/d/300.301

Last updated 2026-09-03. This page is general information, not medical advice. Talk with your child's clinician about your specific situation.