"While achievement growth in math ended up flat, English gains in Newark schools have significantly improved since Booker launched his reforms, according to a study by the Center for Education Policy Research at Harvard."
Excerpt:
...[Cory] Booker, like Bill Clinton, once advocated for charter schools, which operate without many of the regulations that govern traditional public schools. After becoming mayor of Newark, New Jersey, Booker, according to The New Yorker, set out to make the city “the charter school capital of the nation.” Aided by an infusion of money from Facebook CEO Mark Zuckerberg and others, he made progress toward achieving that goal. From the 2009–10 to 2017–18 school years, the share of Newark students attending charter schools rose from 12 to 33 percent.
The data have been impressive. While achievement growth in math ended up flat, English gains in Newark schools have significantly improved since Booker launched his reforms, according to a study by the Center for Education Policy Research at Harvard. (Although funded by what is now the Chan Zuckerberg Initiative, the study—conducted by researchers at Harvard and Dartmouth—was peer-reviewed.) The study found that the movement of students from traditional public schools to higher-quality charters helped drive this progress. According to data from the Newark Board of Education, graduation rates have improved too. That finding is consistent with a 2015 study by the Center for Research on Education Outcomes at Stanford showing that students in urban charter schools perform substantially better than students in other urban public schools.