Produce supporting materials           Computer-based instruction is rarely sufficient without some supporting materials.  We discuss four kinds: student manuals, instructor manuals, technical manuals, and adjunct instruction.  Teachers and students have different needs, and materials for them should be quite different.  Teachers need information about setting up programs, accessing student data, and integrating the materials into their curriculum.  They also need summary information, both for determining whether to use a particular program and also to aid students going through programs. Students primarily need help running a program and moving around in it. Technical manuals are necessary when setting up a lesson is complicated or requires sophisticated devices such as local area networks.  Adjunct instruction includes worksheets, diagrams, exams, photographs, and assignment sheets.