Nearly one in five teachers say they have had negative comments posted about them on social media bY pupils and parents.
A survey by the teachers union, NASUWT, found the posts included comments about the teachers competence, and appearance and threatening behaviour.
While the majority of teachers reported the abuse, 50% of teachers said no action was taken, with less than a quarter said they felt unsupported as the consequences did not match the seriousness of the incident.
Chris Keates, General Secretary of the NASUWT, says it leaves teachers facing 'humiliation' and 'blighted careers':
The Welsh Government say any form of abuse is unacceptable and that they will continue to work to ensure schools are safe: