Nottingham has become the first place in the country to draw up a Fair Workload Charter to reduce stress amongst teachers.
Schools across the city are being urged to sign up and commit to keeping marking and lesson planning to manageable levels.
It is hoped the move will also help tackle the problem of teacher shortages.
The charter, put together by the Nottingham Educational Improvement Board, has its launch today at a conference attended by headteachers and education officials.
Headteacher John Dyson said:
Also present will be national representatives from Ofsted and teaching unions who have given the charter their backing.
Last year, an exclusive survey by ITV Central and the NASUWT found 8 out of 10 teachers in the Midlands had considered leaving the profession in the last two years - in two-thirds of cases, the reason given was excessive workload.