Frustrated teachers and administrators are being lured by independent schools with the promise of more support and freedom. Amid the continuing growth of charter schools in Los Angeles, hundreds of teachers and administrators have left the city's school system to take jobs at the independently run campuses. In the latest wave of departures, dozens of frustrated Los Angeles Unified School District staffers have been courted away by Green Dot Public Schools — one of the city's leading charter operators. Others who are choosing to leave the district for Green Dot or other charters echo Funes' concerns. Working within the nation's...