After listening to the debate at last week's Los Angeles school board meeting, business leader Carol Schatz said she was appalled. She had attended to support a resolution to speed the firing of teachers accused of serious crimes. But even this proposal -- tiptoeing on the margins of improving teacher quality -- generated heated objections from the teachers union and its supporters. With some last-minute amendments and sniping among board members, the resolution passed by a single vote. "I came away depressed," said Schatz, who heads the 500-member Central City Assn. of Los Angeles. "If they can barely pass something...