August 28, 2011 12:40 pm How Do You Evaluate Teacher Performance? Should seniority or student’s test scores decide which teachers in the Los Angeles Unified School district stay or go? US & World Videos 3:14 USC prepares for graduation after encampment removal 1:57 Hazmat team responds after two people are found dead in Northridge 1:04 Homeboy Industries founder Father Gregory Boyle receives nation's highest honor 5:46 NewsConference: Why the political silence during the campus chaos? 5:33 NewsConference: Professors protecting their students