To provide students with disabilities and their families the best educational experience, the use of the functional behavioral assessment should be a viable option when challenging behaviors are interfering with learning opportunities. As the technology of FBA continues to improve through systematic research, educators should not default to the legal requirements, which may, as we have outlined here, leave considerable gaps. States should strive to close those gaps by, at a minimum, including reference to FBA in provisions on evaluation, re-evaluation, IEP development and restraint and seclusion.