Attempting fonnally to evaluate something involves the evaluator coming to grips with a number of abstract concepts such as value, merit, worth, growth, criteria, standards, objectives, needs, nonns, client, audience, validity, reliability, objectivity, practical significance, accountability, improvement, process, pro duct, fonnative, summative, costs, impact, infonnation, credibility, and - of course - with the tenn evaluation itself. To communicate with colleagues and clients, evaluators need to clarify what they mean when they use such tenns to denote important concepts central to their...

Thomas Kellaghan Educational Research Centre, St. Patrick's College, Dublin, Ireland Daniel L. Stufflebeam The Evaluation Center, Western Michigan University, Ml, USA Lori A. Wingate The Evaluation Center, Western Michigan University, Ml, USA Educational evaluation encompasses a wide array of activities, including student assessment, measurement, testing, program evaluation, school personnel evalua tion, school accreditation, and curriculum evaluation. It occurs at all levels of education systems, from the individual student evaluations carried out by class room teachers, to evaluations of...