This paper reports on one aspect of a bigger project: teachers' design of instructional materials. We found a number of design moves used by the teachers in our study. In this paper, we report three of them: Making things explicit, making connections, and resequencing practice examples. [This paper is the fourth in a symposium of four papers. For the first paper "Models of Mathematics Teaching Practice in Singapore Secondary Schools," see ED616186. For the second paper "An Experienced and Competent Teacher's Instructional Practice for Normal Technical Students: A Case Study," see ED616178. For the third paper "Imbuement of Desired Attitudes by Experienced and Competent Singapore Secondary Mathematics Teachers," see ED616187.]