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Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518823112 )

Chilean students march through the streets demanding free education, in Santiago, Chile, Thursday, April. 11, 2013. The marches began during the 2006-2010 Michelle Bachelet administration and have troubled current President Sebastian Pinera even more. Pinera's government is focusing a chunk of the 2013 budget on financing school loans at lower rates. But students say the system still fails them, with poor public schools, expensive private universities, unprepared teachers and unaffordable loans. (AP Photo/Luis Hidalgo) ( APTOPIX Chile Student Protest )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518824024 )

Chilean students dance as they march through the streets demanding free education, in Santiago, Chile, Thursday, April. 11, 2013. The marches began during the Michelle Bachelet government and have troubled President Sebastian Pinera even more. Pinera's government is focusing a chunk of the 2013 budget on financing school loans at lower rates. But students say the system still fails them, with poor public schools, expensive private universities, unprepared teachers and unaffordable loans. (AP Photo/Luis Hidalgo) ( Chile Student Protest )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518824086 )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518823259 )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518823153 )

Chilean students march through the streets demanding free education, in Santiago, Chile, Thursday, April. 11, 2013. The marches began during the 2006-2010 Michelle Bachelet government and have troubled Chile's President Sebastian Pinera even more. Pinera's government is focusing a chunk of the 2013 budget on financing school loans at lower rates. But students say the system still fails them, with poor public schools, expensive private universities, unprepared teachers and unaffordable loans. (AP Photo/Luis Hidalgo) ( Chile Student Protest )

Two students hold up protest signs that read in Spanish; "The state does not regulate the business of prostitution because it is a 'private business.' If education is a private business, what can we expect?, " during a student march demanding free education, in Santiago, Chile, Thursday, April. 11, 2013. The marches began during the 2006-2010 Michelle Bachelet administration and have troubled President Sebastian Pinera even more. Pinera's government is focusing a chunk of the 2013 budget on financing school loans at lower rates. But students say the system still fails them, with poor public schools, expensive private universities, unprepared teachers and unaffordable loans. The(AP Photo/Luis Hidalgo) ( Chile Student Protest )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518824069 )

Students burn an effigy during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518823099 )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518824244 )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518824235 )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518823110 )

Students burn an efigy representing the Justice during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518824593 )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518824027 )

Riot policemen protect themselves during a student protest who demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518824622 )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518823215 )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. MARTIN BERNETTI/AFP/Getty Images ( 518824118 )

Students march during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. CLAUDIO SANTANA/AFP/Getty Images ( 518824789 )

Students clash with riot police during a protest to demand Chilean President Sebastian Pinera's government to improve the public education quality, in Santiago, on April 11,2013. PABLO TAPIA/AFP/Getty Images ( 518824809 )