Staten Island teachers say they're wearing the shirts because the UFT backed Rev. Al Sharpton's march.
The PROSE schools will offer a variety of changes to curriculum and school structure, officials said.
A week after heralding their $5.5 billion UFT deal, the city said it would actually cost $8.9 billion.
The deal would extend retroactively to 2009, giving teachers billions of dollars in back pay.
Officials said labor talks remained ongoing, as the mayor canceled a major housing policy talk.
Teachers and principals will use student grades and work to decide who passes summer school.
Union officials said they would fight for the mayor's tax hike on the wealthy in Albany.
Bloomberg said the union failed to uphold its end of a deal to handle teachers under investigation.
Teachers needed new materials to prepare students for the harder Common Core tests.
Union workers plan to rally to highlight lack of contracts and claim that city has cash for backpay.
Success Academy Cobble Hill removed the fixtures last summer, without DOE supervision, the agency said.
Public Advocate Bill de Blasio has called for an examination of Success Academy Cobble Hill.
2,500 teaching jobs are on the line, Mayor Michael Bloomberg warned.
The deadline for the negotiations passed at midnight Friday.
Class sizes rose across the city this year, the Department of Education said.
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