The current study evaluated whether a manualized training in functional behavioral assessment (FBA) would result in typical school professionals being able to conduct a procedurally adequate FBA with a technically accurate summary statement for student behavior. Additionally, the study examined whether summary statements obtained by trained school staff were validated by formal functional analyses. The efficiency and social validity of the FBA training process was also investigated through use of an acceptability rating questionnaire and a log to document time expended by each participant. Twelve school professionals participated in Practical FBA trainings that consisted of four 1-hour training sessions guided by a training manual. A post-test analysis of FBA knowledge content indicated that the trainees ended training with the knowledge and skill needed to conduct FBAs. Ten of the 12 professionals completed formal FBAs that were then submitted to validation via functional analysis. Results of the 10 functional analyses confirmed that all 10 school professionals accurately identified the antecedents and maintaining function of student behavior. All FBAs conducted by trained school professionals were considered procedurally adequate. The average time expended by participants in completing an FBA was under 2 hours. Participants also indicated high acceptability of the Practical FBA tools and procedures. This research study presented preliminary findings supporting the efficacy of an FBA training program for school personnel. Further implications, limitations, and directions for future research are presented. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]