Demonstrators carry a mock coffin that reads "Popular Education" and "education dead" during a rally...
Demonstrators carry a mock coffin that reads "Popular Education" and "education dead" during a rally in Santiago city, June 30, 2011. Tens of thousands of students marched in Chile's capital on Thursday demanding changes in the public state education system. REUTERS/Victor Ruiz Caballero (CHILE - Tags: POLITICS CIVIL UNREST EDUCATION SOCIETY)