Teachers report increase in cyber bullying

An increasing number of teachers are reporting that they are being bullied online.

A help line set up for people who work with children has told the BBC that around a third of its calls are about bullying, and teachers are being targeted not just by students, but by parents.

The National Association of Head Teachers warns that experienced and valued staff will be forced out of the profession unless more is done to stop it.

Chris Buckler reports.