Substitute teachers are educators who temporarily fill in for regular teachers when they are absent. They are responsible for maintaining classroom order, delivering lesson plans, and ensuring that students continue their learning in a structured environment. Substitute teachers can work in various educational settings, including elementary schools, middle schools, and high schools. To become a substitute teacher, individuals typically need a high school diploma or equivalent, although some states may require a college degree or specific certification. They often receive training on classroom management and educational practices to help them effectively engage with students and handle different classroom situations.