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Re:The Myth of Charter Schools by tptacek on Tuesday October 19, 2010 @01:41PM (#1807965)
Thanks for the added context. In case I've unfairly summarized the author's point, here's the graf it comes from:

But contrary to the myth that Guggenheim propounds about “amazing results,” even Geoffrey Canada’s schools have many students who are not proficient. On the 2010 state tests, 60 percent of the fourth-grade students in one of his charter schools were not proficient in reading, nor were 50 percent in the other. It should be noted—and Guggenheim didn’t note it—that Canada kicked out his entire first class of middle school students when they didn’t get good enough test scores to satisfy his board of trustees. This sad event was documented by Paul Tough in his laudatory account of Canada’s Har- lem Children’s Zone, Whatever It Takes (2009). Contrary to Guggenheim’s mythology, even the best-funded charters, with the finest services, can’t completely negate the effects of poverty.

One might salvage the author's point by saying that it's simply arguing that charters aren't a cure-all; that the disciplinary problems that sabotaged that middle school class are going to exist for any charter, &c.

Re:The Myth of Charter Schools by Alex3917 on Tuesday October 19, 2010 @01:47PM (#1807995)
I think your summary was fine, I just think the author was using a bad example. But I agree that the overall point holds.