In the process, Mr. Barr has fomented a teachers revolt against the Los Angeles Unified School District. He has driven a wedge through the city’s teachers union by welcoming organized labor — in contrast to other charter operators — and signing a contract with an upstart union. And he has mobilized thousands of black and Hispanic parents to demand better schools. | In the process, Mr. Barr has fomented a teachers revolt against the Los Angeles Unified School District. He has driven a wedge through the city’s teachers union by welcoming organized labor — in contrast to other charter operators — and signing a contract with an upstart union. And he has mobilized thousands of black and Hispanic parents to demand better schools. |