Thirty specific standards developed as guiding principles to maintain the utility, feasibility, propriety and accuracy of evaluations in educational programs, projects and materials are presented. Utility Standards include Audience Identification, Evaluator Credibility, Information Scope and Selection, Valuational Interpretation, Report Clarity, Report Dissemination, Report Timeliness, and Evaluation Impact. Feasibility Standards include Practical Procedures, Political Viability, and Cost Effectiveness. Propriety standards include Formal Obligation, Conflict of Interest, Full and Frank Disclosure, Public's Right to Know, Rights of Human Subjects, Human Interactions, Balanced Reporting, and Fiscal Responsibility. Accuracy Standards include Object Identification, Context Analysis, Described Purposes and Procedures, Defensible Information Sources, Valid Measurement, Reliable Measurement, Systematic Data Control, Analysis of Quantitative Information, Analysis of Qualitative Information, Justified Conclusions, and Objective Reporting. By following these guidelines, evaluators can serve the practical information needs of a given audience by conducting realistic, prudent and frugal evaluations that are ethical and valid in reflecting the study objects' features and merit. Each standard is defined with its purpose and procedural guidelines. Difficulties in applying standards and tradeoffs are discussed with cases illustrating the standards which are relevant to broad evaluation functions. The rationale and development of the standards are discussed. (CM)