School psychologists can play a unique role in schools because of their assessment expertise. Traditionally, they have been most involved in individual psychoeducational assessment for classification and labeling purposes, but the limitations of this form of assessment for building intervention strategies has led many school psychologists to broaden their role. Currently, there are at least three major purposes of school psychological assessment: (1) informing entitlement/classification decisions; (2) planning interventions; and (3) evaluating outcomes. Techniques linking assessment to interventions are being demonstrated by school psychologists as they consult with teachers to enhance the classroom performance of students. Further, school reform initiatives have required more program evaluation at the building and system level and school psychologists are engaged in these activities as well. Assessment is an important task in the schools, and school psychologists can increase their impact on school effectiveness by contributing their expertise in this domain at many levels. (JBJ)