This paper represents a tribute to the career of Ralph Winfred Tyler, whose publication "Constructing Achievement Tests" served as the basis for most of the major efforts in evaluation since 1934. Tyler's career is traced from his doctoral studies at the University of Chicago to his guidelines for national assessment. (LMO)

Four trends important to educational research and development are traced, and serve as background for describing the evolving status of educational evaluation. The long-range future for educational evaluation is assessed. (MH)