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Ample evidence that bullying is a systemic problem at the international level ...

„16 % of students reported being bullied about weekly, providing ample evidence that bullying is a systemic problem at the international level and that bullying is occurring during the early years of schooling. […] 76 % of Korean students report never being bullied, while only 23 % of South African students report similarly.“

IEA (Hrsg.), „How systemic is international bullying and what relationship does it have with mathematics achievement in 4th grade?“ (April 2018), S. 2