Staff at All Saints Roman Catholic High School have backed the campaign calling on the Government to fair fund the city's schools.
More than 6,000 people have now signed the petition which has been launched with the backing of Sheffield Council, Learn Sheffield, the city’s six MPs, businesses, schools, community groups and individuals.
READ MORE: Sheffield unites to launch petition for fairer funding for city schools
Figures have revealed schools in city will receive £743 per pupil less than Manchester in 2018/19, £589 less than Nottingham and £80 per pupil less than Leeds - and under the Government's new national funding formula the area does not get 'a fair deal'.
An average sized primary school in Sheffield would receive £260,000 more, a secondary schools £822,000 more if its pupils were funded at the same rate as Manchester.
READ MORE: Sheffield tech tycoon backs petition to redress "chronic lack of funding" in city schools
The Department for Education said the purpose of the new funding formula is to correct historic disparities in the funding system, which involves redistributing funding to historically underfunded areas.
A spokesman said that schools in the area will attract an increase in funding of 6.6 per cent - equivalent to £20.4 million - when the NFF is implemented in full, but headtachers and school leaders said this is not in line with inflation and rising costs.
Remember to tweet a picture of yourself holding a poster with the hashtag. Alternatively email it to email@example.com or write Sam Jackson, The Star, The Balance, Pinfold Street, S1 2GU