Responsibilities. Follow school schedules and arrive promptly for duties: 7:25 a.m. – 3:15 p.m. ON TIME ARRIVAL IS VERY IMPORTANT IN SETTING THE TONE OF THE SCHOOL DAY. Once students arrive, teachers must remain in their classrooms. There were multiple concerns last year about students in the classrooms by. Remain at school for the entire school day and inform the principal in advance, when it is necessary to be absent from duties or leave the pr...