This document provides an overview of functional behavioural assessment (FBA). It discusses that FBA aims to understand the context and function of a child's behavior by collecting data on antecedents, behaviors, and consequences. The goal is to develop a hypothesis and intervention to increase positive behaviors and reduce negative ones. The document outlines the stages of FBA, including identifying problems, gathering information, determining functions, developing a plan, implementation, and evaluation. It also discusses considerations around FBA such as collecting information types, theoretical basis in behaviorism and ecological systems theory, and pros and cons.