The principle of the multiplier-accelerator interaction is explained, and how a computer program to model it can be developed is shown. A series of simulations that can be used to explore the model's behavior are suggested. The simulations can be used in college-level economics classes. (Author/RM)

Discusses visual style in instructional science materials; describes problems with science media, including too much print on a page or screen and inappropriate designs for children; and highlights new products that have good design style as well as good content, including books, computer simulations, videos, computer software, and microworlds.…