A large proportion of national education and treatment centers for persons with autism spectrum disorders (ASD), including those providing applied behavior analysis (ABA)-based services, show a relatively high percentage of agreement among practitioners on the instruments they routinely use for a variety of purposes, including curriculum design and treatment evaluation. In this paper, several assessments are reviewed and evaluated in terms of their utility for designing comprehensive early intensive behavioral intervention (EIBI) curriculum programs for children with ASD. The assessments found to be most useful for this purpose are reported. A general critique regarding the available pool of assessment tools is provided and the need for a comprehensive assessment directly linked to curricula is discussed.