In recent years, steps have been taken to combat extremism and radicalization through recommendations and laws aimed at characterizing and prohibiting extremist speech leading to violence. This preventive effort also involves the need for training of professionals and few specifically European tools have been developed. Our aim is to fill this gap. It is a question of training higher education professionals, managers and education leaders who define training courses in order to help each political decision-maker to better construct training plans aimed directly at education and training. To achieve this, the CEDAR project is based on the production, implementation and deployment of European training for teachers and trainers to enable them to improve their skills on the issues of deviance and extremism in educational and university circles. The aim is also to support these education professionals in order to provide them with the keys to identifying and preventing risks. The CEDAR project will make it possible to train university professionals on the implementation of appropriate actions in relation to situations of deviance and extremism that can lead to violence among young people and students.The CEDAR project aims to produce multilingual training modules (French, Spanish, English) but will also develop a network of European trainers capable of disseminating these training courses and integrating them into degree courses. It will also aim to increase the skills of professionals from community organisations and associations working directly with young people in neighbourhoods with specific target groups (migrants, unemployed young people and early school leavers, etc.). Indeed, services in charge of youth in educational contexts are bearing an increasing burden (increase in specific cases, new forms of migration in the European context due to conflicts in the world or sometimes natural disasters ...) and, at the same time, they must be aware of the risks linked to violent extremism, which has become a daily reality.By mobilising scientists and academics with expertise in these fields at European level and by organising two training sessions in Europe which will be multiplied at national level in the partner countries, the CEDAR project will enable the design and implementation of a comprehensive course to accompany European trainers and teachers on these issues of radicalisation and violent extremism among young people. An e-learning platform will be accessible to professionals who will then be sensitised and trained on the risk factors of radicalisation among young people and students. Our project will be based on empowering students themselves by strengthening their civic engagement through the use of the counter-discourse process (Students Against Hate). In particular, students will be encouraged to participate in awareness campaigns on campus.