e-learning is shaping the education in Europe and points to new and creative ways for teaching knowledge. In general, the euphoria on e-learning in the 1990s has given way to an efficient use of e-learning and has particularly led to an increasing trend of using e-learning in vocational schools and training institutions. This development, however, has not reached all parts of Europe according to surveys by CEDEFOP (European Centre for the Development of Vocational Training) and the quality of e-learning based teaching in vocational education and training (VET) varies widely, depending on the personal competence of the teacher. There is no doubt that "chalk and talk" is still the dominant form of teaching in VET, but the teaching personnel have realised that they do not teach only knowledge, but also accompany a learning process. In this context, e-learning tools offer a huge range of solutions to accompany the learning process in a very stimulating learning environment and setting. Against this backdrop, new media and learning materials require continuous further training and qualification of staff. Some teachers are lacking in acceptance or the necessary know-how to use e-Learning successfully for themselves and their learners. This cognitive overload and disorientation within the medium play an important role, as much as inadequate technical conditions and a lack of user-friendliness of e-learning platforms. Mostly dedicated teachers with different prior knowledge get involved with e-learning, develop an e-learning platform and use it for lessons. Because of the highly fragmented education and training market in Europe, characterised by a large number of different private and public actors, it was and is a challenge to implement a consistent and systematic use of e-learning in the field of VET. Also, different educational traditions and cultural predispositions play a significant role when it comes to the question of how the acceptance of e-learning can be increased. cet facilitates now the use of ICT and e-learning methods in VET. cet addresses the strategic European priority outlined in the General Call for Proposals 2011-2013 to support the initial and continuous training of VET teachers, trainers, tutors and VET institution managers.