Sir Frederick Mander FEIS (12 July 1883 – 27 February 1964) was a headmaster and trade unionist and the General Secretary of the National Union of Teachers (NUT) from 1931 to 1947.
Following the strikers' action, in 1926 the Board of Education ruled that teachers' salaries should be agreed at a national level by the Burnham Committee.
He resigned as headmaster of his Luton school to become the NUT's General Secretary, a position he held from 1931 to 1947, when he retired.
In 1931 Mander opposed government demands that teachers' pay should be reduced by up to 30 per cent because of the economic crisis at that time.
Mander was Chairman of Bedfordshire County Council between 1952 and 1962, and was a member of the Executive of the Association of Education Committees.