This 4-part document provides an overview of educational evaluation. Part I outlines the problems in educational evaluation, distinguishing between evaluations of student performance (objective attainment) and those of system operation (cost-effectiveness). Part II reviews existing practices in educational evaluation, focusing on the evaluation of students. The purposes, frequency, uses, some implications of testing, and the types of instruments used are also described. Part III indicates some national and regional agencies, international services, and individuals who have been working on the problems in educational evaluation. Part IV suggests areas for potentially fruitful research, noting the varities of possible studies and the directions they could take. (RA)