The Capital Times:

Madison Urban League President Kaleem Caire fought hard to win approval of his Madison Prep project. But the Madison School Board ultimately rejected a plan that would have steered tens of millions of taxpayer dollars into a project that board members felt lacked sufficient oversight and accountability.
The response of Caire and his fellow Madison Prep advocates was to suggest a variety of moves: the filing of a complaint with the U.S. Department of Justice, or perhaps a request for state intervention to allow the project to go forward without state approval.
We would suggest another approach.
Caire has succeeded in garnering a good deal of support for Madison Prep. He could capitalize on that support and make a run for the School Board.

Much more on the proposed Madison Preparatory IB charter school, here.
Changing the school board would either require: patience (just two of seven seats: Lucy Mathiak, who is not running after two terms and Arlene Silveira, who apparently is seeking a third term) are up in April, 2012 or a more radical approach via the current Wisconsin method (and Oakland): recalls. Winning the two seats may not be sufficient to change the Board, given the 5-2 no vote. Perhaps the “momentum”, if realized, might sway a vote or two?
Perhaps the TAG complaint illustrates another approach, via the courts and/or different government agencies.