Bullying commonly defined as an aggressive behavior that is intentional, repeated for a long time and involves an imbalance of power. It can have negative effects on children's physical and psychological health and can even escalate to the tragedy of suicide. Aim: This study aimed to determine effectiveness of video-assisted nursing intervention on bullying prevention measures and procedures among primary school teachers.Methods: A quasi-experimental design with pre and post-test was used.

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... e: Simple random sample of 100 primary school teacher was included. Settings: The study was carried out at four primary schools in Shebin-Elkom and menouf, Menoufia Governorate, Egypt. Tools: Tool one: teachers' self-administered structured interview questionnaire (a) Demographic data (b) Teachers knowledge regarding bullying. Tool two: bullying preventive measures likert scale.Results: The study showed that after video-assisted nursing intervention there was statistically significant improvement in the knowledge of primary school teachers' about bullying compared to before nursing intervention. Also, there was statistically significant improvement in teachers prevention practices regarding bullying after video-assisted nursing intervention compared to before nursing intervention. There was positive correlation between teachers' total knowledge scores and total practices scores about bullying post intervention.Conclusions: Implementation of video-assisted nursing intervention achieved significant improvements in the primary school teachers' knowledge and practices measures regarding bullying prevention. Recommendations: Prominently utilizing video-assisted nursing intervention strategy in teaching bullying to promote children's health and improve knowledge and practices of teachers.