Substitute Teachers support Lead Teachers and Teaching Assistants in order to provide a high quality, multicultural, inclusive educational experience to prepare all children and families for life and school. Physical Demands : To perform the job, the employee must be able to lift and potentially carry a child weighing up to 50 pounds, routinely kneel, bend, crouch, and sit on the floor for extended periods and stand, walk and sit on child-sized chairs throughout the day.