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NEW YORK, NEW YORK - SEPTEMBER 28: Parents, schoolchildren and education activists rally during an event supporting public charter schools and protesting New York's racial achievement gap in education, in Prospect Park, September 28, 2016 in the Brooklyn borough of New York City. The #PathToPossible rally and march, organized by the Families for Excellent Schools, is calling for New York City to double its public charter school sector to 200,000 students by 2020. An estimated 25,000 people attended the rally. (Photo by Drew Angerer/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 28: Parents, schoolchildren and education activists rally during an event supporting public charter schools and protesting New York's racial achievement gap in education, in Prospect Park, September 28, 2016 in the Brooklyn borough of New York City. The #PathToPossible rally and march, organized by the Families for Excellent Schools, is calling for New York City to double its public charter school sector to 200,000 students by 2020. An estimated 25,000 people attended the rally. (Photo by Drew Angerer/Getty Images)