Without data, you are just another person with an opinion ... Without data, you are just another person with an opinion

Amanda Ripley:

U.S. officials defended their schools--blaming poor performance on the relative prevalence of immigrant families in the United States. But Schleicher and his colleagues noted that native-born Americans performed just as unimpressively. In fact, worldwide, the share of children from immigrant backgrounds explains only 3 percent of the variance between countries. A country's wealth does not predict success, either. Gross domestic product per capita predicts only 6 percent of the difference in scores. Schleicher also noticed, however, that in the U.S. in particular, poverty was destiny. Low-income American students did (and still do) much worse than high-income ones on PISA. But poor kids in Finland and Canada do far better relative to their more privileged peers, despite their disadvantages.

In Germany, the test became a household name and inspired a prime-time TV quiz show, The PISA Show. Even Schleicher's father began taking his work more seriously. Meanwhile, Schleicher visited dozens of schools and pored over the data. He concluded that the best school systems became great after undergoing a series of crucial changes. They made their teacher-training schools much more rigorous and selective; they put developing high-quality principals and teachers above efforts like reducing class size or equipping sports teams; and once they had these well-trained professionals in place, they found ways to hold the teachers accountable for results while allowing creativity in their methods. Notably, in every case, these school systems devoted equal or more resources to the schools with the poorest kids.

These days, Schleicher travels the world with a PowerPoint presentation detailing his findings. It seems to have more data points embedded in its scatter plots than our galaxy has stars. When his audiences get distracted by the tribal disputes that plague education, he returns to the facts with a polite smile, like C-3PO with a slight German accent. He likes to end his presentation with a slide that reads, in a continuously scrolling ticker, "Without data, you are just another person with an opinion ... Without data, you are just another person with an opinion ..."

More, from Steve Hsu.

How does Wisconsin stack up against the world? Learn more, here: www.wisconsin2.org.

Posted by Jim Zellmer at July 5, 2011 5:30 AM
Subscribe to this site via RSS/Atom: Newsletter signup | Send us your ideas