FBA vs BIP: What Teachers Need to Know (with an Example)

An FBA (functional behavior assessment) finds out why a behavior happens; a BIP (behavior intervention plan) uses that answer to change the behavior with prevention strategies, a replacement skill and consistent adult responses. The FBA always comes first, because a plan built without knowing the function is a guess. As a teacher, you probably won’t write either document alone, but your observations and data shape both. This guide explains each one, who does what, and walks through a classroom example from start to finish.

FBA vs BIP at a glance

What an FBA does

An FBA looks at the behavior in context. The team defines the behavior precisely, collects data, and forms a hypothesis about its function: what the student gets or avoids by doing it. Most behaviors serve one of four functions:

• Escape or avoidance: getting out of a task, demand, place or person.
• Attention: getting a reaction from adults or peers, positive or negative.
• Access to tangibles: getting an item or activity.
• Sensory: the behavior itself feels good or relieves discomfort.

Typical FBA steps:

1. Define the behavior in observable terms. Not “is disruptive” but “throws materials off the desk.”
2. Interview the teacher, family and, when appropriate, the student.
3. Review records: attendance, discipline, health, prior interventions.
4. Collect ABC data across several days and settings.
5. Look for patterns in time of day, subject, demand, people present.
6. Write a hypothesis statement: “When [antecedent], the student [behavior] in order to [function].”

ABC data: the teacher’s most useful contribution

ABC stands for Antecedent (what happened right before), Behavior (what the student did), and Consequence (what happened right after). Keep notes short and factual.

Even three or four days of entries like these often show a pattern. Here, the behavior shows up when independent written work starts, and the result is that the work goes away. That suggests an escape function.

What a BIP includes

A BIP turns the hypothesis into action. Most include:

• Target behavior and its function.
• Prevention (antecedent) strategies: changes that make the behavior less likely, like breaking tasks into chunks, offering choices, or pre-teaching.
• Replacement behavior: a safer behavior that gets the same need met, like requesting a break.
• Teaching plan: how and when the replacement behavior will be taught and practiced.
• Reinforcement: how the replacement behavior and other expected behaviors will be acknowledged.
• Response strategies: what adults do when the behavior happens, so it no longer “works.”
• Crisis plan, if safety is a concern.
• Data collection and review dates.

A BIP should match the function. If a behavior is escape-maintained, sending the student to the hallway may actually reinforce it, because it removes the work.

Example: from FBA to BIP

Behavior: During independent writing and math tasks, a 3rd grade student pushes materials off the desk and refuses to work, about 4 times a day.

FBA hypothesis: When given independent written work that looks long or hard, the student pushes materials away and refuses, in order to escape the task. Interviews suggest the student has gaps in writing and math facts and feels embarrassed.

BIP highlights:

• Prevention: Give work in smaller chunks (one section at a time); start with one problem the student can do; provide a visual checklist; offer a choice of order.
• Replacement behavior: Request a 2-minute break using a break card, then return to the task.
• Teaching: Practice using the break card in calm moments, with role-play, for the first week.
• Reinforcement: Specific praise and a point on a check-in chart each time the student uses the card or finishes a chunk; points add up to a preferred activity.
• Response: If the student pushes materials away, calmly prompt the break card, keep the task available, and help the student complete one small part before moving on. Avoid removing the task entirely.
• Data: Frequency of materials pushed off the desk per day; number of break card uses; percentage of chunks completed. Review in four weeks.

For a full template with every section filled in, see our behavior intervention plan example.

How the BIP connects to IEP goals

If the student has an IEP, behavior goals should match the BIP’s replacement behavior. In this example, a goal might read: “When presented with independent work, the student will request a break using a break card instead of pushing materials away in 4 of 5 opportunities across 2 weeks.” More examples are in our guide to behavior IEP goals.

Common mistakes to avoid

• Skipping the FBA and writing a plan based on a hunch.
• Defining the behavior vaguely, which makes data meaningless.
• Picking consequences that reinforce the behavior, such as removing work for escape behaviors or giving big reactions for attention behaviors.
• No replacement behavior, only a list of punishments.
• No data review date, so the plan never changes.
• Not sharing the plan with specials teachers, paras and lunch staff.

Where MTSS and PBIS fit

Most schools use a tiered system of support. Tier 1 covers schoolwide expectations for everyone. Tier 2 adds small-group supports like check-in/check-out. An individual FBA and BIP is typically a Tier 3 support for students who need more. A student doesn’t need an IEP to get one.

A note on law and privacy

FBA and BIP requirements depend on federal law, state rules and district procedures, and the team decides what applies. This article is general guidance, not legal advice. Keep behavior data in your school’s official system, use initials in informal notes, and never enter identifying details into an AI tool.

For the whole picture of the IEP cycle, data collection and working with paraprofessionals, see our special education teacher resources.