In the scientific, industrial world of today, specialization is a key word. With increasing frequency, jobs that used to be performed by only one or a few persons are being analyzed and, for the sake of greater effectiveness, broken down and assigned to specialists in the field. One area that has been slow in following this trend is that of education, Years ago, the teacher in a one-room school was assigned such diverse duties as snow-shoveling, hauling water, cutting wood, and keeping a fire going. In today's schools, these non-instructional chores are replaced by such duties as ordering films, setting up a projector, making transparencies, setting up a resource library, collecting money, making attendance reports, doing clean-up chores, planning individualized instruction, and attending meetings, graduate courses, and in-service training programs.
Kolb, Janis, "A study of teacher aides" (1968). Honors Projects. Paper 5.