To the extent possible, District boundary changes should result from organized, careful planning. The statutes of Nebraska provide, however, for changes of boundaries and responsibility for providing educational services through various processes over which the Lincoln Board of Education has little, if any, actual control. To the extent that the District can influence or control such changes, the Board will take into consideration whether or not the property involved is contiguous to the boundaries of the District, the present and prospective number of students involved, the present and probable future valuation of the property, the present and probable future use of the property, and any other educational or economic factors that may be pertinent to the proposed change.