Gary Rubinstein is the Myth-Buster of the Resistance. He has achieved this eminent position because of his intolerance for hype, propaganda, and lies.

In this post, he bust the myth that low-income charter school graduates have a dramatically higher college graduation rate than low-income public school graduates.

In fact, he shows, charter school graduates have the same college graduation rate as their mothers!

Education Reform propaganda at The74 would try to make you believe that while low income students generally graduate from college at a rate of about 9%, charter school graduates complete college at a rate of 3 to 5 times that.

The main flaw in any comparison between the college graduation rates of charter school graduates to low-income students, in general, is that the charter school students do not represent a random sampling of the general population of low-income students.

In The Alumni, Richard Whitmire says that charter schools that have 5 times the expected college completion rate are ones that only counted their students who persisted until 12th grade in their charter schools.  Since for some charter schools, this only represents about 25% of the students who started in that charter school, this even more of a biased sample.  But, Whitmire explains, the one network that has the most valid way of doing a fair comparison is the famed KIPP network.  Since KIPP counts, in their data, any students who enrolled in KIPP, even if they left soon after starting.  And he says that KIPP students, including ones who didn’t persist at KIPP, graduate college 3 times the expected rate.

Reform supporting billionaire John Arnold commissioned Mathematica, a data analysis company, to study the college enrollment and college persistence of KIPP students.  Instead of comparing KIPP students to the general population, they compared KIPP students to students who had applied to the KIPP lottery but did not get into KIPP through the lottery.  This is a much more valid way of measuring the impact of KIPP.  The big takeaway, as I wrote about in my previous post, was that students who applied to KIPP, whether or not they got into KIPP, had a college persistence rate of about 3 times the general low-income population and that students who applied but didn’t get into KIPP had about the same college persistence as students who applied and did get into KIPP.  So students to apply to the KIPP lottery are the ones who, on average, were much more likely to persist in college — something that Whitmire never mentions in The Alumni.

But this Mathematica report includes some other relevant data that I didn’t pick up on when I wrote the last post.  Fortunately there was a discussion among some readers who commented on the last post which pointed this out.

In 2018 the National Center For Education Statistics published a report called ‘First-Generation Students College Access, Persistence, and Postbachelor’s Outcomes.’  In it they say that about 70% of students who have a parent who completed college also complete college compared to about 35% of students who do not have a parent who completed college.  This confirms what most people would expect for so many reasons and this is why we celebrate when students are the first in their family to graduate college.  It means that the descendants of those students will also be more likely to go to college…

At this point, Gary displays a graph from the Mathematica study.

Notice that last line.  It says that of the students entering the lottery about 27% of them had mothers who finished college.  This makes the fact that about 30% of the students in the study (which includes students who got into KIPP and also students who did not get into KIPP) have persisted in college through four semesters even less surprising.