Partners from nine European countries developed a cyberbullying training manual for the benefit of trainers working with parents, school staff and young people.1 The development of the training manual built on a two-level qualitative research process that combined elements of the Delphi method and online focus groups. The two studies outlined in this article aimed to assess trainers' and experts' views on the problem of cyberbullying while also gathering insight in relation to their preferences in terms of a training manual. This article outlines the main outcomes of a content analysis of experts' and trainers' views. According to experts and trainers, the sources of cyberbullying were specifically related to new technical developments and new patterns of usage, a lack of media literacy and media education, and the lack of appropriate laws, control and reporting mechanisms. Approaches for tackling cyberbullying suggested by experts and trainers included the provision of enhanced information on ICT and e-safety, adequate rules, monitoring mechanisms and sanctions. Furthermore a range of approaches targeting children and young people, parents and other adults, schools as well as approaches run by authorities and IT providers were suggested. In terms of the elements and style of a training manual, experts and trainers emphasised that it should be practically oriented, and that elements like narratives, case examples or video clips would be vital for the implementation of training.