       DANIMIR MANDIC Informatics and didactic University of Belgrade Faculty of Teacher Training SERBIA This paper deals with a concept of Knowledge system which is created to support modern learning and teaching. Educational technology is constantly changing and improving in line with the development of science and information technology. Traditional teaching is most often criticized for insufficient activity of students, inadequate teaching intuition and dynamism, the impossibility of individualisation of teaching, lack of continuous feedback on the achievements of students and others. Intensive development of telecommunications technology and computer systems, permanent connection to the Internet and WEB based learning systems enabled better use of computer technology in teaching. Computer based knowledge systems provide flexible organization of activities, lectures and study materials and a complex evaluation of students. Teaching is often formalized, verbalized and not sufficiently visual, reducing knowledge durability as well as possibility of connecting theory with real life. Multimedia knowledge systems is created for personal computers offer possibility for making electronic text books involving text, pictures, sounds, animations and films, in such a way that learners can individually proceed in learning teaching contents, they can return to contents which are not clear enough to them, they can receive feedback and additional information in accordance with their own capabilities and interests. Interactivity and quality of presented materials, using multimedia and hypertext, offer considerably richer contents compared with teaching carried out in traditional classroom Key,Words: , Knowledge system, WEB portal, Education, WEB based learning,, Teaching., Distance education   The traditional teaching is well known by frontal work with remarkable teachers teaching function which does not provide sufficient interaction with the students. They doesn’t leave enough time for independent activities of students in the qualitative function of learning. Teaching is often formalized, verbalized and which reduces the apparent lack of continuity of knowledge and connect theory with real life. In last ten years there was strong develop and improve of didactic media, teaching methods and forms in function of raising the efficiency and effectiveness of the teaching process. The current organization of teaching is created as a comprehensive cognitive system. As a rule, feedback is lacking. After completion of hours students do not know how they successfully overcame the curricula or teacher has full knowledge picture of their students. Feedback should follow the course every step of the teaching process in which current practice is not the case. Teaching is more based on the entropic than systematic approach. One reason for this situation is poor didactic,technical environment in which teaching takes place. The process of modernization of existing technologies is taking place much faster in production areas, and is rightly expected that schools and faculties follow the innovative processes and to educate young professionals in accordance with the needs of society and economy. The world is made important steps towards equipping schools with modern didactic media, but the school expects to adequately equip them to apply new methods and forms of work with pupils and students. Only in the last ten years with the mass use of computers in schools has created the prerequisites for quality educational technology innovation. Multimedia applications designed for personal computers offer the ability to create electronic books with text, pictures, sound and animation films so that students can independently to progress in mastering instructional content, to return to the contents RECENT ADVANCES in ARTIFICIAL INTELLIGENCE, KNOWLEDGE ENGINEERING and DATA BASES ISSN: 1790-5109 221 ISBN: 978-960-474-154-0