> Charter schools dont actually perform any better than public schools, and actually result in a net decrease in educational attainment because there is less money for public schools.

Meanwhile this study found during that period that nyc charters enrolled significantly less esl students, disabled students, and poor students, and had 8 times the rate of suspensions.

https://www.uft.org/sites/default/files/attachments/City_and_State_Excluding_Charters_12.11.19.pdf

This investigation found that 155 of 183 charter schools had disciplinary policies in violation of federal or state civil rights laws in New York city

https://gothamist.com/news/nyc-charter-schools-are-illegally-pushing-out-difficult-kids-report-alleges

This investigation found that success academies, which was mentioned in the article you posted, expelled massive numbers of students. At one school 1 in 5 students who started at that school was expelled by the end of the year

https://www.nydailynews.com/new-york/education/success-academy-fire-parents-fight-disciplinary-policy-article-1.1438753