A protester aims a rock at a huddle of shielded riot police Thursday in Santiago, Chile, after students held a massive march demanding free education.

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.

Students, however, say the system still fails them, with poor public schools, expensive private universities, unprepared teachers and unaffordable loans.