Gary Rubinstein has wondered about attrition at the Success Academy charter chain. The chain claims its schools are public schools, but public schools don’t hide their data. Finding out about SA data is a detective hunt. He found much of what he was looking for not in city data but in state data.

Gary writes here about what he has learned. 

“Success Academy opened in 2006 with 156 students — 83 kindergarteners and 73 first graders. Now, eleven years later, they have their first graduating seniors, though just 17 of them. In my last post I wondered what can be learned about the Success model by examining who exactly those 17 students are.

“A big question, and one that might never be answered, is how many of those 17 students were actually among the original 73 first graders. Since Success allows transfers up until 4th grade it is possible that some of those 17 students transferred in which would make their attrition rate even worse than the 77% that it is at a minimum.

“New York State has a pretty good data site which I used to look at the most recent data from the 2016-2017 school year. I then compared the data about the 10th and 11th grade from 2016-2017 to the data of their kindergarten and 1st grade from 2006-2007…

”For the class of 2018, the 17 who are about to graduate and who have been celebrated in the media, what we can say from the data from last year was that they had 20 students of which 9 qualified as economically disadvantaged. So there are at most 9 out 17 (53%) now or, depending on which three students left, as few as 6 out of 17 (35%). This does not support the claim that the Success survivors have the same demographics as their neighboring schools.

“If the net result of eleven years of Success Academy is to get 9 low-income students into college, that’s a lot of hype and a lot of money to be spent for that, not to mention all the loss of resources to the 1,099,991 other students in New York City schools who had to suffer a loss of resources as Success used their influence and marches and wealthy donors money to stage publicity stunts in Albany and to get the Governor to go to battle with the Mayor about having the city pay charter school rents.”

Read his detective work. He dug deep. It shouldn’t be this hard.