Work Environment Moderate noise (examples: classroom/office environment with computers, printers, and telephones; regular conversations within classrooms/offices, cubicles, hallways, and conference rooms; meetings one-on-one, in small groups, and large settings, etc.). Essential Functions Reporting directly to the school principal, the long-term substitute teacher performs the following duties: Provide for instructional needs and interests of students with the aid of appropriate and effective daily lesson planning.