This handbook, designed as a guide for new evaluators in the Pittsburgh Public Schools, provides an orientation to the "Discrepancy Evaluation Model" and a detailed outline of the administrative procedures necessary to conduct day-to-day activities in the first two stages of program evaluation. Guidelines for use during the first stage of evaluation stress the need for coordination between the evaluator and the program staff while planning, generating, and amending the program evaluation design. Stage II guidelines specify requirements for implementing the evaluation design developed in Stage I. The appendix includes summaries of completed evaluations of the Pittsburgh kindergarten program. [Figures 1 and 4 may be of poor quality when reproduced due to fine print.] (JH)