The potential use of computers to enhance individualized instruction in schools is too often neglected in both preservice and inservice teacher education. This report describes some materials developed and used to introduce teachers to computer applications in support of classroom teaching. The materials include some interactive computer-based modules currently in use at the University of Iowa. Included are descriptions and information on: (1) staff requirements for implementation, (2) computer modules currently in use, (3) a sample unit outline and bibliography for the system, (4) sample program runs for selected topics included in the computer-based teaching system, and (5) the computer program listings for the system--written in BASIC for Hewlett Packard 2000F computers with the Interactive Dialog Facility (IDF). A paper on the subject of computer usage in teaching at the elementary and secondary level that may be used for both preservice and inservice training is also provided. (DGC)