A lockdown drill is a safety exercise conducted in schools and other institutions to prepare for emergencies, such as an active shooter situation. During this drill, students and staff practice how to quickly secure their environment by locking doors, turning off lights, and staying quiet. The goal is to ensure everyone knows what to do in case of a real emergency, helping to keep them safe. These drills are important because they teach people how to respond calmly and effectively under pressure. Schools often schedule these drills regularly, and they may involve local law enforcement, such as the police, to provide guidance and support.