The final document in a series on least restrictive environment (LRE) placement for handicapped students summarizes the objectives and findings of the project. Research questions, methodology, and conclusions are reviewed from each of four research activities: state education agency analysis; local education agency analysis; legal analysis; and description of noteworthy policies and procedures observed regarding identification and evaluation, placement decision making, parent/student involvement, review and reevaluation, and program and individual services. Findings from the four activities are compiled in an analysis of standard operating procedures for LRE determination, determination of placement, ancillary activities, and contextual factors and constraints. (CL)