This study developed schematic video to help vocational high students with MR solve multi-step real-life word problems. The single-subject design across students was employed with 4 phases: base, intervention, maintenance and transfer. Paper and pencil tests were used in base and transfer phases, and computer tests were used in intervention and maintenance tests. The students were found to be interested in the schematic video software and the schemas help them to think and solve multi-step arithmetic word problems.