Hundreds of mobile classrooms are still in use across the West Midlands, the Department for Education and Skills has revealed.
A total of 580 temporary buildings are still used by schools in Birmingham, Solihull and the Black Country.
Last night a Birmingham MP accused the Government of "waffle" over its promises to rebuild every school in the country.
John Hemming (Lib Dem Yardley) said: "They say they will put the money in, but we're not really getting very far."
But Labour MP Gisela Stuart said: "I see what has been achieved every time I visit a school in my constituency, but there is much more to do."
The Government has promise to rebuild or refurbish every school in the country by 2015.
Birmingham schools received a boost last year, when a city council bid for funding to rebuild or refurbish 36 of the city's 76 secondary schools under the Government's Building Schools for the Future programme last year was accepted.
The authority needs at least £ 307 million to improve schools.
But the scale of the challenge facing councils is shown by the DfES figures, which show Birmingham still has 320 temporary buildings, while Dudley has 115, Sandwell has 27, Solihull has 103 and Walsall has 13.
The rebuilding programme uses the controversial Private Finance Initiative.
A spokeswoman for Birmingham City Council said it was hoping to receive £750 million over 12 years for school improvements.