Functional Behavior Assessment (FBA): What Teachers Need to Know

Understanding WHY, Not Just WHAT

A Functional Behavior Assessment (FBA) is a systematic process for identifying the function (purpose) behind a student's challenging behavior. The FBA answers the question: "Why is this student engaging in this behavior?"

Why FBAs Matter

Behavior always serves a function. When we understand the function, we can design effective interventions. Without understanding function, we are guessing -- and guessing usually means punishing, which often makes behavior worse.

The Four Functions of Behavior

Nearly all behavior serves one of four functions:

Attention -- The student wants attention from peers or adults (even negative attention).

Escape/Avoidance -- The student wants to avoid a task, person, setting, or situation.

Access to Tangibles -- The student wants access to an item, activity, or privilege.

Sensory Stimulation -- The behavior itself provides internal reinforcement (stimming, fidgeting, humming).

The FBA Process

Define the Behavior -- Describe the behavior in specific, observable, measurable terms. Not "aggressive" but "hits peers with open hand during unstructured time, averaging 3 times per day."

Collect Data

• ABC Data -- Antecedent (what happened before), Behavior (what the student did), Consequence (what happened after). Patterns emerge from ABC data.
• Frequency/Duration -- How often does it happen? How long does it last?
• Setting Analysis -- When and where does it occur? When does it NOT occur?

Analyze Data -- Look for patterns. Does the behavior happen during specific subjects? With specific people? At specific times? What typically happens after the behavior?

Identify Function -- Based on the data, hypothesize the function. This drives the intervention plan.

Your Role as a Teacher

• Complete ABC data collection forms accurately and consistently
• Provide information about when behavior does and does not occur
• Participate in FBA team meetings
• Implement recommended strategies consistently
• Report changes in behavior frequency and intensity

The FBA leads to a Behavior Intervention Plan (BIP) with specific strategies. See our BIP guide for implementation details.

Use the IEP goal generator to write behavior goals aligned with FBA findings.