A pedagogical model of hypertext authoring is presented. The model encourages self-regulated, constructive thinking to create knowledge by manipulating corresponding screen representations. One application of the design-oriented model is described, with screen illustrations. (MSE)

A set of guidelines for evaluating interactive multimedia used in college instruction is offered in the form of 10 "commandments" illustrated with humorous anecdotes. They stress descriptive approaches to research and evaluation, including modeling methods that integrate quantitative and qualitative data. (Author/MSE)