Gary Rubinstein began his career in Teach for America but became a career math teacher in New York City. He also writes a blog, where he has achieved fame and notoriety as the nation’s ultimate fact-checker of “miracle schools” whose claims are too good to be true.

As he explains in this post, he first entered the arena of miracle-School mythbusting when he heard Arne Duncan boast about a charter school in Chicago that had once been a low performing public school. That charter, Urban Prep, Duncan said, now had a 100% graduation rate and a 100% college acceptance rate. Rubinstein checked the data and found that the school had high attrition and low pass rates on state tests, lower than Chicago public schools.

“Urban Prep Charter School in Chicago is the original ‘miracle school.’ Seven years ago at the Teach For America 20th anniversary alumni summit, I heard Arne Duncan talk about how they had 100% of their senior class graduate and how 100% of them went on to college after they shut down the public school in that building and replaced it with a charter school.”

He was roundly criticized by charter trolls on Twitter but he was unfazed.

Now he finds this charter, with its miraculous outcomes, has expanded to a chain of three, all boasting the same 100% college acceptance rates. But the city may close one of them for low performance.

Rubinstein checked the data. See what he found.

It is astonishing. All three campuses perform worse than the Chicago public schools. The real miracle is that they still have a 100% college acceptance rate.

Where is the New York Times?