This article gives an account of the research, theory and empirical findings of a research and development project lasting nearly five years which took place within the framework of the ArctiChildren Project. In terms of background, bullying is viewed from an educational and societal perspective, in which developments and trends in research are elucidated. The control documents regulating the activities of schools are accounted for and the Equality of Treatment Act is extensively dealt with. The concept of bullying is discussed under its own heading. National and international research on the effects and consequences of bullying are accounted for. The theory section concludes with a survey of various different programmes, models, plans and methods for preventing and dealing with bullying in schools. Under the headings Development Work in the ArctiChildren II Project and Research in the ArctiChildren Project, the work done in the participating schools is reported.