We present in this paper a multimedia distance-learning environment. The multimedia supports accessibility and the access to the knowledge for all. Our aim is to make the training system truly accessible by the disabled persons, according to three principles: knowledge availability, users' extensive and personalized assistance and system flexibility. The incorporation of computer science and telecommunications has profoundly changed the implementation problems of learning systems. A distance learning environment is an individual and customizable implement allowing every user to have access, in a simple way, and across networks, to the communication tools, services and digital means, which he needs for his activity.The implementation of such environment is becoming possible by the development of the Internet / Intranet and the appearance of Multi Agents Systems "MAS". In our model, human users and artificial agents carry out tasks in the disabled learners' service. We define the internal structure of our kernel supposed to work within Internet/Intranet settings. It is claimed that the agent-based technology is a suitable approach for two main reasons: agents are a natural metaphor of human acts, and the learning systems are usually complex.