The purpose of this series of case studies was to compare the impact of Constant Time Delay and Strategic Instruction on the maintenance and generalization of learning. Four middle school students with learning disabilities were effectively taught two different groups of multiplication facts using Constant Time Delay and Strategic instruction. The researchers measured students' levels of maintenance and generalization after receiving each type of instruction. Maintenance data were collected using 1-minute fluency probes. Generalization data were collected using timed (1-minute) and untimed probes. Strategic Instruction appeared to have a greater impact on the students' maintenance and generalization of multiplication skills. The students' performance and perceptions are discussed in terms of potential implications for the classroom. (Contains 1 table.)