Discusses the roles of visual thinking, visual rehearsal, and introspection in educational technology, and suggests that instructional designers should externalize their internal representations and involve the internal and external representations of content specialists and learners in the instructional design. Fifteen references are listed. (MBR)

Describes instructional development process applied to the design, production, implementation, and evaluation of a computer simulation designed to provide troubleshooting practice for individuals who maintain and install large digital telephone switches. The major organizational benefits resulting from use of the simulation are discussed. (MBR)

This discussion of how to design a training program to teach professional judgment and performance focuses on a model for training police officers. Open job skills are explained, appropriate choices and actions are described, and the components and objectives of open job skill instruction are presented. (LRW)