On Wednesday, the Chicago Public School board will meet to vote on a number of new charter school proposals.
On Tuesday night, parents and teachers marched to CPS headquarters, where they planned to hold a vigil overnight.
Those who oppose the charter schools say they are a waste of public money.
"The funding is not being evenly distributed. And when charter schools proliferate, the funding goes away from our neighborhood schools," said teacher Michelle Gunderson.
CPS says its final recommendations on this year's charter applications will reflect its commitment to its students and families.