This paper reports on a case-study design experiment in the domain of fraction as number-measure. We designed and implemented a set of exploratory tasks concerning comparison and ordering of fractions as well as operations with fractions. Two groups of 12-year-old students worked collaboratively using paper and pencil as well as a specially…

PROJECTTUTOR is an intelligent tutoring system that enhances conventional classroom instruction by teaching problem solving in project planning. The domain knowledge covered by the expert module is divided into three functions. Structural analysis, identifies the activities that make up the project, time analysis, computes the earliest and latest…

Historical thinking involves being able to conceptualize historical events from multiple perspectives and to relate historical data within these. Hypermedia has enormous potential for supporting the development of historical thinking because it is open, nonlinear, and heterogeneous in ways other media is not; it can physically represent…