This paper covers the application of functional behavioral assessment (FBA) to treatment of problem behavior in residential facilities. Basic behavioral concepts are covered with emphasis on antecedent events and their importance in assessment and treatment. The paper focuses on two types of assessment, the behavioral interview and A-B-C narrative recording. These two assessment strategies are covered because they are well suited to the strengths of residential facilities. The paper includes recommendations for the implementation of these two assessment strategies and a case study is presented.