Lever and fulcrum: Educational technology in teachers' thought and practice.

States that after eighty years of efforts to apply technology in the classroom in ways that would `revolutionize' education, most teaching practice still looks the way it did at the beginning of this century. Lack of proof that using technology increases achievement; Government subsidies on research into how technology might help solve some of the problems in education; Apple Computer's Apple Classroom of Tomorrow; IBM's Teacher Preparation and K-12 Improvement programs; More.