An honest assessment of e-learning material available on the Web, and in particular of the material on technical subjects, would show that most of it is simply the Internet publication of standard printed formats [1]. In some cases, the presentation is enhanced by animated inserts showing various simulations [2], and, in few more cases, the theory is demonstrated with live experiments [3]. However, the experiments are pre-designed and the students have few choices available, either executing a prescribed experiment, or acquiring data, or trying various control parameters [4].