Sen. Marco Rubio (R-Fla.) on Monday unveiled a series of education reform proposals that could become part of a presidential platform in 2016.

Rubio, who came to the Senate in 2011 with more than $100,000 in student loan debt, unveiled three education reform proposals that he said would reduce the cost of college and graduate school.

It was Rubio’s second major policy speech of 2014, taking place a month after he laid out a conservative vision for combating poverty on the 50th anniversary of President Lyndon B. Johnson’s “war on poverty.”

His farthest-reaching proposal calls for private investment groups to pay for tuition in exchange for a percentage of future earnings. It would not replace federally subsidized student loans, but would instead provide an alternative to students who don’t want to take on tens of thousands of dollars in debts.