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...