The "CSE Program Evaluation Kit" is a series of nine books intended to assist people conducting program evaluations. This volume, the third in the kit, discusses the logic underlying the use of quantitative research designs, including the pretest-posttest design, and supplies step-by-step procedures for setting up and interpreting the results from experimental, quasi-experimental, and time series designs. Six designs, including some unorthodox designs, are discussed in detail. The book also includes instructions about how to construct nonrandom samples. The following chapters are included: (1) "An Introduction to Evaluation Design"; (2) "The Elements of Design"; (3) "Designs--An Overview"; (4) "Designs 1, 2, and 3: The Control Group Designs"; (5) "Designs 4 and 5: The Time Series Designs"; (6) "Design 6: The Before-and-After Design"; (7) "A More Complex Design: Analysis of Variance (ANOVA)"; and (8) "How To Randomize." (Contains 9 tables, 3 figures, numerous unnumbered illustrative figures, and 12 references.) (SLD)