Typical web lectures consist of two different kinds of media linked together: an audio- or video-recording and the corresponding slides or desktop recording. Both media are synchronized so that the slide or image shown corresponds to the position currently played in the time-based media stream. Web lectures are thus composite media consisting of a…

To participate in a particular Web-based training session students work with a number of tools reflecting a particular training strategy. By doing so they access different training objects containing relevant information for their current training task. Since modern WBT systems support dozens of different, sometimes rather complex tools and…