An allegation that a comprehensive school head teacher slapped her deputy is being investigated by police.
Despina Pavlou, who became head of Lord Grey School in Bletchley, Buckinghamshire, in 2000, is working from home during the investigation.
Acting head Roger Conibear said she had not been suspended and the governors were addressing "management issues".
A Thames Valley Police spokesman said police were investigating an allegation of assault at the school on 2 February.
A spokesman for Milton Keynes Council, the local education authority, said it was working closely with governors and the school to resolve the matter and ensure the education was not affected.
'Very good leadership'
Mr Conibear said apart from " a little excitement" it was business as usual at the languages foundation school which has about 1,400 pupils.
In the school's 2003 Ofsted report it was praised by inspectors for significant improvement through its "very good leadership with a strong focus on learning".
The report also highlighted that such leadership had meant that GCSE results at the school had reached the national average level.
The report added: "The head teacher provides a very clear educational direction and is well supported by the leadership team.
"There is very good teamwork and strong commitment by managers at all levels."