The handbook is intended to assist evaluators working with preschool model demonstration projects funded by the Handicapped Children's Early Education Program (HCEEP). Background on HCEEP is provided, and the function of evaluation within the network is emphasized. A section on planning evaluations deals with such aspects as focusing, planning specific evaluation strategies, considering evaluation methods, selecting instrumentation, and planning for reporting and implementing the evaluation. The roles of the Joint Dissemination Review Panel, designed to assess the effectiveness of federally funded programs, are considered with special emphasis on the relationship of HCEEP and the review panel. A final section presents suggestions on procedural and personal matters for evaluation consultants. (CL)