New instructional time blocks and curriculum designs are suggested as alternatives to traditional school schedules with their fixed time periods for traditional course offerings. The rational for variable modular scheduling and the application of computer technology to school scheduling are presented. Applications of variable modular scheduling being implemented at various schools are described and presented as practical examples. Discussions are grouped according to (1) background to the organization of schools, (2) teaching and administrative considerations, (3) curricular innovations, (4) nonstructured learning conditions, (5) evaluations of variable modular scheduling, and (6) speculations about future directions. (MLF)