Each school day, our nation's schools are entrusted to provide a safe and healthy learning environment for approximately 55 million elementary and secondary school students in public and nonpublic schools. In collaboration with their local government and community partners, schools can take steps to plan for these potential emergencies through the creation of a school Emergency Operations Plan (school EOP). It is recommended that planning teams responsible for developing and revising school EOPs use this document to guide their efforts. It is recommended that districts and individual schools compare existing plans and processes against the content and processes outlined in this guide. The guide is organized in four sections: (1) the principles of school emergency management planning; (2) a process for developing, implementing, and continually refining a school EOP with community partners (e.g., first responders and emergency management personnel) at the school building level; (3) a discussion of the form, function, and content of school EOPs; and (4) "A Closer Look," which considers key topics that support school emergency planning, including addressing an "active shooter," school climate, psychological first aid, and information-sharing. The Departments issuing this guidance are providing examples of good practices and matters to consider for planning and implementation purposes. The guidance does not create any requirements beyond those included in applicable law and regulations, or create any additional rights for any person, entity, or organization. This guide replaces "Practical Information on Crisis Planning: A Guide for Schools and Communities" (January 2007) (ED498806), which has been rescinded. [For the companion report, see ED627267.]