In recent times, adequate space for education has become critical and fewer dollars are available for new school construction. Recently built facilities are sometimes overcrowded and often lack the flexibility to respond to new concepts of educational programing. As a result, planners are turning to other means for solving critical space needs without compromising educational, protection, safety, and health standards. This publication was developed to provide a guide for educators and planners who are seeking to put to use one innovation in educational facilities -- "found" space. The planner cannot easily mold existing space to fit his needs; rather, he must work within the parameters of space originally designed to meet entirely different requirements. To assist the planner, this publication examines the planning principles he can use to achieve this objective and, through a series of questions, assists him in an evaluation of potential space for conversion. Outstanding examples of successful conversions are described. (Photographs may reproduce poorly.) (Author/MLF)