Advocates of differentiated staffing suggest that teaching duties could be categorized to allow for different interests, abilities, and ambitions. Differentiated staffing, the ultimate outgrowth of innovations such as team teaching, nongraded programs, teacher aides, and open space planning, utilizes teachers to the maximum. Because it eliminates the burden of subprofessional work and bases the salary schedule on the degree of responsibility, differentiated staffing promotes professional development and increases the responsibility and expertise of teachers. (Author/MLF)