There is increasing consensus among psycho-educational scholars about argumentation as a means to improve student knowledge and understanding of subject matter. In this article, we argue that, notwithstanding a strong theoretical rationale, causal evidence is not abundant, definitions of the objects of study (argumentation, learning) are often not…

Since the mid-1990s, however, the popularity, diversity, and application of virtual worlds have spread rapidly. As a result, existing taxonomies and topologies increasingly are becoming less effective at being able to classify and organize the growing diversification of content available in today's virtual worlds. This article presents the…

Two studies demonstrated the usefulness of single-subject research in providing a teacher with empirical support for using one method of instruction rather than another for a particular special-needs child. Drill-and-practice software helped older hearing impaired students learn to spell and define new words. (RH)