District 9 of the Bronx, a high poverty and minority neighborhood, saw over 50% of the students fail the Algebra I Regents. Moreover, only 2% reached the top tier scores By contrast Success Academy 2 in the Bronx had a 100% pissing rate and all were in the top tier. However, on further inspection its like comparing apples to oranges.
If you read only the New York Post you would think that the above paragraph is all there is, Sure, District 9 has academically struggling schools but that's due to high percentages of Special Education, English Language Learners, homeless, and family dysfunction, both financially and the lack of a two parent household. By contrast, Success Academy 2 of the Bronx have few Special Education students or English Language Learners, and homeless students. Furthermore, the family situation is much more stable than in District 9.
A closer look at Success Academy 2 of the Bronx show what the New York Post failed to include. the 30% of students who dropped out (pushed out?) of the school since 6th grade when there were 72 students. That left only 53 students to take the Algebra 1 test. I strongly suggest that you read Gary Rubenstein's blog who did a deep study of the data and showed how poorly Success Academy students did on the Geometry and Algebra II Regents..