Housing and social conditions in urban America suggest a major shift of the inner city poor to the older suburban neighborhoods. This paper explores that anticipated massive population exchange and suggests ways to measure its effect on the schooling process. The concern here is that thousands of poor city dwellers will relocate to the suburbs and thousands of middle class suburban dwellers will relocate in the inner city. The urban middle class influx is already being encouraged by cities' efforts to acquire Federal mortgage money. This population shift will involve a shift in both class and racial composition that will cause social problems for receiving schools in both community types, the inner city and suburbs. Now is the time to plan for this population shift, not in the middle of the confusion that is certain to come. (Author/EB)