Teachers working with students who exhibit problem behaviors need new tools to assist their efforts to effectively address challenging behavior. The "Behavioral Objective Sequence" (BOS; Braaten, 1998) is a user-friendly instrument that provides a developmental perspective for responding to these behaviors within an instructional model. The BOS can be used to assess student functioning level, identify students at risk for special education referrals, determine special education eligibility and least restrictive environment, develop Individualized Education Programs, design instructional plans, and ensure accountability for program. The determination of essential classroom environment components can also result from application of the BOS so that teachers can immediately implement more effective strategies.