An important category of SMET digital library content will be highly interactive, explorable microworlds for teaching science, mathematics, and engineering concepts. Such environments have proved to be extraordinarily time-consuming and difficult to produce, while threatening the goals of widespread creation and use. One proposed solution for…

Computer Assisted Instruction (CAI) is, quite simply, an instance in which instructional content activities are delivered via a computer. Many commercially-available software programs, although excellent programs, may not be acceptable for each individual teacher's classroom. One way to insure that software is not only acceptable but also targets…