Why to use a dynamic adaptive hypermedia for teaching, and how to design it?.
For many years, hypermedia has been a new research area in the field of computer aided teaching systems. Three kinds of systems have successively appeared: first classical hypermedia, then adaptive hypermedia and finally dynamic adaptive hypermedia. Dynamic adaptive hypermedia sys-tems are more efficient, but they are rarely multimedia and hardly ever use the Internet to send cour-ses. This paper begins with a historical reminder then introduces the architecture of METADYNE, a dynamic adaptive hypermedia system. This system allows to create and to distribute multimedia-based courses adapted to the learner, and to transmit courses via the Internet. An open architecture and the respect of standards allow the user to connect to the system with a simple browser, and enable the system to connect a large range of pedagogical multimedia databases.