Reports in the ERIC database have found that computer-assisted writing instruction has some effect--if not a dramatic impact--in both the quantity and quality of student writing. Although computers are becoming more common in schools, the influx of computers into schools may not assure students ample opportunity to use them. Limited time-on-task may be one of the reasons. However, the computer will almost certainly become more and more a part of the lives of students, whatever the limits of the experience they have in using computers in school. The computer's great advantage for writers who know how to compose on one is its facilitation of revision. (Twenty references are included.) (JK)