The anti-bullying programme "Zero" was implemented at 146 Norwegian primary schools. The outcome among pupils was evaluated after 12 months of the total 16-month period using an age-equivalent design. The present study shows that bullying was reduced among pupils in the schools participating in the Zero programme. Moreover, National surveys in spring 2001 and spring 2004 showed a reduction in pupils being victimised in Norway over 3 years. The high profiled national Manifesto Against Bullying started officially in September 2002 and the first period lasted 2 years. The majority of the schools comprising the 2004 national sample reported a substantial increase in anti-bullying work compared to the three-year period before 2001. Interactions between national concern and programme effect are discussed.