Discusses a three-year research project in which a virtual environment to teach radioactivity in secondary schools in the United Kingdom was developed and tested. Emphasizes the importance of involving teachers through the development process and confirms the importance of school-based evaluation studies in the development and evaluation of…

Describes software that was designed in the United Kingdom to promote conceptual change in secondary school students studying mechanics. Direct Manipulation of Mechanical Microworlds, an interactive computer simulation, and VARILAB, a computer-based language for modelling systems, are explained; and two studies that will evaluate the effectiveness…