For supporting the teaching activities on linear system theory, a World Wide Web-based laboratory is being developed. It integrates both simulation and implementation aspects in the same framework. Modules covering the main topics of the linear system analysis are developed using a colloquial language approach in order to attract and retain the attention of the students. The emphasis is on the qualitative aspect of the theory, although various quantitative measurements and exercises are requested on each module. In order to obtain further details or to solve learning difficulties, the students can communicate to a team of instructors by means of electronic mail. Evaluation tests are also available through the Web. The laboratory can be used as an auxiliary tool for a current undergraduate engineering course or as a valuable framework for distance learning projects. (Author)