The intent of this paper is to recount briefly the management process and the sequence of activities that have let the Baltimore City Public School System to the stage in its curriculum development where the focus is on learning hierarchies as a major tool in the improvement of the teaching/learning process. In the fall of 1973, Baltimore City began the process of moving toward the use of learning hierarchies throughout the school system. The movement has gained momentum and commitment within the system since that early step. This effort was based on the following expected benefits for the student: (1) increased rate of learning, (2) increased resistance to forgetting, and (3) increased motivation. Following study sessions in 1973, management plans were developed by the Office of Staff Development for Phase I of an extensive inservice training program. Phase II is now being planned to provide each teacher in the school system additional support at the point of using learning hierarchies in the classroom. This support will be in response to the observed needs identified from operation of Phase I of the continually evolving long-range plan to implement learning hierarchies into the classroom curriculum of Baltimore City Public Schools. (Author/JM)