New York State has this really big idea. It will spend $4.5 million so that top charter schools can teach ordinary public schools how to succeed.

What secrets will the charter schools share with the less fortunate, less successful neighborhood public schools?

Consider the example in the article linked here by Ben Chapman in The Daily News.

The Bronx Charter School for Excellence will help nearby Public School 85. “More than 86% of students… passed state reading exams in 2012, compared with just over 20% of students who met literacy standards at PS 85.” On the other hand, PS 85 has a devoted parent body, and it can help the charter school develop the same community support.

But there is more to the story, which did not get into the article.

I asked my favorite statistical miracle-buster, Gary Rubinstein, to check the demographics on the two schools and here is his report:

“I collected some data here http://miracleschools.wikispaces.com/Bronx+Charter+School+For+Excellence

“Most relevant stats for students taking ELA test:

Excellence

263 students taking ELA exam
36 with disabilities (14%)
3 LEP (1%)
207 economically disadvantaged (79%)

“Compared to PS 85 (from district 10, not 8)

531 students
142 with disabilities (27%)
165 LEP (31%)
511 economically disadvantaged (96%)”

The NYC progress reports say this about the two schools:

“Excellence:

10% disabilities, 87% black or hispanic, 5% ELL
86% passing ELA, 95% passing math
progress report grades: C in ‘progress’, ‘A’ overall

PS 85:

24% disabilities, 98% black or hispanic, 26% ELL
20% passing ELA, 31% passing math
progress report grades: B in ‘progress’, ‘B’ overall”

So the public school has about twice as many students with disabilities as the charter school (and we can’t tell how severe the disabilities are, whether they are mild or extreme from this data; some of the most successful charters accept students with only the mildest disabilities).

And of the students who took the reading test, 31% at the public school were English language learners, compared to only 1% at the charter school.

The lessons for PS 85 are obvious: Do not accept students who can’t read English and limit the enrollment of students with disabilities.

But if PS 85 learns that lesson, where will those children go to school?