This report describes phase 1 of a projected 2-phase project designed to investigate the feasibility of developing an interactive videodisc to teach math and science concepts to preschool handicapped children. A videodisc system is proposed that would allow children to manipulate real-world objects in order to acquire concrete knowledge about abstract concepts. The report covers Phase 1 activities, including target audience specification, literature review, interviews with experts in the relevant fields, product review, hardware and software review, the enlisting of industry support, and the design team meeting. A design plan is presented which specifies the target audience, educational principles, content, products, design components, and program operation. Appendices making up the greater part of the document include letters of support, copies of survey instruments, a summary of the design team meeting, the review of the literature, summaries of interviews with experts, and a product review. The literature review of 66 references covers the use of microcomputers in teaching preschool math and science, the use of microcomputers in early childhood special education, the use of videodiscs with children, teaching science and math concepts in the preschool, and adapting preschool math and science for special education. The product review describes 121 math and science software programs available for preschoolers. Includes 13 references. (JDD)