Efficiency of computer supported learning material (by integrating simulations and hypertext)

For the use of computer supported learning material a new method has been implemented within the CoLoS project to overcome the obstacle of complex interfaces. Such interfaces all too frequently form a barrier between the content to be studied and the support, expected to be given by the computer. This method permits to control a simulation through active links, embedded in learning or exercise material in html-format. Such material and the linking mechanism can be prepared by a single teacher and distributed over the net. The implementation is done by using standard ICCCM methods of the X-windows system. Based on this method and using the generic simulation environment xyZET, an introductory course for mechanics has been developed with a variety of topics like velocity, acceleration, centre of mass, collision, harmonic oscillator, pendulum a.o. this course material is currently being evaluated under controlled conditions. The evaluation will be based on measuring the differences between pre- and post-tests and responses to questionnaires about cognitive load and learning atmosphere. During a first run with a class of a German high school, optimal conditions are offered to find out about feasibility, time constraints, stability of motivation, etc. Further factors to be varied are teacher involvement and measures to stimulate students for explorative and self guided actions. First results collected during summer 1996 are reported.