School administration and supervision must be scientific, based on accepted educational philosophy, and creative. It must also be evaluated based on its results. To be effective, administration and supervision must emphasize using facts and scientific principles to discover solutions. It should also be guided by and integrate educational philosophies, like Dewey's view that education is life and growth. Administration encourages growth by providing opportunities for teachers and pupils to develop their talents. The effectiveness of administration can be determined by evaluating the outcomes and whether it promotes pupil and societal growth. Clear definition of duties is also important to avoid conflicts between administrators at different levels.