A male teacher had quit his job at a private girls' school after he pestered a pupil with romantic emails and texts.
Darren Holmes, who taught at £9,500-a-year Sheffield High School, developed an 'intense and romantic relationship' with the girl, the Professional Conduct Committee of the General Teaching Council has ruled.
For more than a month, Holmes continued to contact the pupil via email and text messaging.
The committee found him guilty of 'unacceptable professional conduct' and suspended him for two years, ruling that he 'behaved inappropriately with a pupil by engaging in personal and unprofessional correspondence by email and text messages'.
Speaking in the Daily Mail, committee chairman Andrew Connell said : 'The communications were highly inappropriate but there is no evidence of any meetings out of school or sexual activity.
'We were very concerned about the nature of the contact between Mr Holmes and Pupil A and consider it fortunate for all concerned these matters came to light within a few weeks, following which Mr Holmes resigned.'
Mr Connell said the conduct, which Mr Holmes admitted, fell short of the standard expected of a registered teacher, was a serious breach of the Code of Conduct and Practice for Registered Teachers, and was behaviour which involved a breach of the standards of propriety expected of the profession.
He added: 'Mr Holmes failed to establish and maintain appropriate professional boundaries in his relationship with Pupil A.'
In mitigation, the committee took into account that Mr Holmes had shown remorse and insight into his behaviour.
A spokeswoman for the school declined to comment on the case but said: 'We take the safety and wellbeing of our pupils very seriously, and have robust and well-established safeguarding policies and procedures.
'We always co-operate fully with any official inquiry and do not hesitate to bring matters to the attention of the appropriate authorities where we think there might be a case to answer.'