(Cyber)bullying can become a serious burden for children and young people. Often, those affected do not manage to free themselves from such a psychologically stressful situation without help. Especially in the context of schools, the question therefore often arises as to how professionals can deal with bullying, both preventively and actively, when bullying occurs. The klicksafe teachers' handbook "What to do in case of (cyber)bullying?" offers basic information, suggestions for practice and introduces systemic conflict management. In July, klicksafe, together with the participating authors Thomas Grüner and Jürgen Schmidt, is offering two modules on the topic of bullying as a full-day online training course for the third time.