Report on ECDS: An Interactive Course on the Internet Paul Dekker, David Beaver Abstract: Report on ECDS: An Interactive Course on the Internet Paul J. E. Dekker, David I. Beaver From 3rd May until 12th July 1996, an academic course was given for an international (and intercontinental) group, via the internet. The course was given by Paul Dekker and David Beaver, both employed at the University of Amsterdam. Taking part in the course were twenty people from Japan, Uruguay, the United States, and a number of European Countries. A group of fifty interested observers, spread across the worlds five main continents, also followed the course. The course subject was Dynamic Semantics, a branch of formal linguistics which grew up in the 1980s, and which impinges upon mathematics, computer science, cognitive science and the philosophy of language. The Netherlands, and the ILLC research institute at the University of Amsterdam in particular, has a leading position in this interdisciplinary research area. The most distinctive feature of the course is that it was taught entirely via the Internet, in terms not only of distribution of teaching materials, but also of the teaching itself (via weekly ``virtual classrooms''). During the preparation of the enterprise, the organizers could find no indication of there having ever been any comparable academic course, that is, any wholly electronically taught course which was both truly international, and truly interactive. For this reason it seemed important to record our experiences, and make them available to a wider audience. In this document we report on the course, on the methods which were developed and used, and on our experiences with organizing and teaching a course over the Internet. In the first section, we summarize what the course achieved and give our main conclusions. The second section briefly describes those involved in the course, and the third section details the course itself. In the fourth and final section we describe our observations and conclusions in more detail.