The U.S. Department of Education (Department) is committed to supporting State educational agencies (SEAs), local educational agencies (LEAs), and partners in ensuring that schools and preschool programs have additional tools to foster safe, inclusive learning environments that increase students' engagement and sense of well-being. The Office of Special Education and Rehabilitative Services (OSERS) and the Office of Elementary and Secondary Education (OESE) are jointly offering guidance on the use of functional behavioral assessments (FBAs) for all students whose behavior interferes with learning. Briefly, an FBA is a process for identifying the reasons behind, or factors contributing to, a student's behavior. This guidance is rooted in evidence-based practices to support students and allowable activities under both the Elementary and Secondary Education Act of 1965 (ESEA) and the Individuals with Disabilities Education Act (IDEA) -- both of which emphasize a collaborative approach to support the Nation's students. With a focus on supporting the behavioral needs of students, and providing educators with the tools needed to anticipate and prevent behaviors that interfere with learning, the Nation's schools, early childhood programs, and students can experience improved academic performance, improved social and emotional competence, reduced exclusionary discipline, and improved school organizational health and school climate.