National Crime Agency also reveals rise in sexual attacks on and interest in children.
App blamed for circulating false information in India, Brazil, Kenya and now the UK.
Campaigners have called for children to be taught that sexting can lead to bullying and blackmail after the figures emerged. The call came as it emerged one in ten girls aged 11 and 12 have been asked for nude pics.
Culture secretary condemns unsupervised access to smartphones and urges more heads to ban them in schools.
The chief inspector of Ofsted is backing headteachers who ban mobile phones to prevent bad behaviour.
The girl has filed a complaint against the Winchester school system, saying her education is hampered by a hostile environment.
The idea of "toxic stress" has been in the news lately because of heartbreaking separations at the border, but millions of kids experience that kind of stress every day because of their home environments.
More New York City students say there is bullying in their schools, a report released Monday showed. The findings also revealed that many schools reporting the greatest number of violent incidents on campus have no social workers on staff..
Children as young as in kindergarten have started to show signs of stress. Here are a few teaching strategies that you can help your students.
A MidAmerica Nazarene University survey of 1,000 teachers with at least five years in the classroom also found smartphones are largely seen as a "persistent" source of disruptions.s